|| U. Nulden, “e-ducation: research and practice,” Journal of Computer Assisted Learning, vol. 17, No. 1, pp.363-375, Mar. 2001.|
 Karen Chassie, “The allure of e-learning,” IEEE Potentials, Vol. 21, Iss. 3, pp. 33-35, Aug.-Sept. 2002.
 Learning Technology, http://www.lt.ncu.edu.tw/intro/intro.htm.
 U. Farooq, W. Schafer, M. B. Rosson, J. M. Carroll, “M-Education: Bridgin the Gap of Mobile and Desktop Computing,” Proceedings of 2002 IEEE Wireless and Mobile Technologies in Education, Växjö, Sweden, pp.91-94, Aug. 29-30, 2002.
 H. Jeong and M. T. H. Chi, “Construction of Shared Knowledge During Collaborative Learning” Proceedings of 1997 Computer Support for Collaborative Learning Conference, Boulder, Toronto, Canada, Dec. 1997.
 B. N. Schilit and M.M. Theimer, “Disseminating Active Map Information to Mobile Hosts” IEEE Network, Vol. 8, Iss. 5, pp. 22-32, Sep.-Oct. 1994.
 R. Want, A. Hopper, V. Falcão, and J. Gibbons, “The Active badge Location System,” ACM Transactions on Information Systems, Vol. 10, Iss. 1, pp. 91-102, Jan. 1992.
 T. Rodden, K. Cheverst, N. Davies, and A. Dix, “Exploiting Context in HCI Design for Mobile systems,” Proceedings of the First Workshop on Human Computer Interaction with Mobile Devices, Glasgow, Scotland, pp. 12-17, May 1998.
 P.J. Brown, J.D. Bovey, and X. Chen, “Contest-Aware Applications: From the Laboratory to the Marketplace,” IEEE Personal Communications, Vol. 4, Iss. 5, pp. 58-64, Oct. 1997.
 S. Thrun, M. Bennewitz, W. Burgard, A. B. Cremers, F. Dellaert, D. Fox, D. Hähnel, C. Rosenberg, N. Roy, J. Schulte, and D. Schulz, “MINERVA: A Second-Generation Museum Tour-Guide Robot,” Proceedings of 1999 IEEE International Conference on Robotics and Automation, Detroit, Michigan, pp. 1999-2005, May 1999.
 B. Jensen, G. Froidevaux, X. Greppin, A. Lorotte, L. Mayor, M. Meisser, G. Ramel, and R. Siegwart, “The interactive autonomous mobile system RoboX,” Proceedings of 2000 IEEE/RSJ International Conference on Intelligent Robots and System, Lausanne, Switzerland, Vol. 2, pp. 1221-1227, Oct. 2002.
 P. J. Prodanov, A. Drygajlo, G. Ramel, M. Meisser, and R. Siegwart, “Voice Enabled Interface for Interactive Tour-Guide Robots,” Proceedings of 2002 IEEE/RSJ International Conference on Intelligent Robots and System, Lausanne, Switzerland, pp. 1221-1227, Oct. 2002.
 R. Oppermann, and M. Specht, “Adaptive Support for a Mobile Museum Guide,” Proceedings of 1998 Interactive Applications of Mobile Computing, Rostock, Germany, Nov. 24-25, 1998.
 M. Fleck, M. Frid, T. Kindberg, E. O’Brien-Strain, R. Rajani, and M Spasojevic, “Rememberer: A Tool for Capturing Museum Visits,” Proceedings of 2002 UbiComp, Göteborg, Sweden, pp. 48-55, Sep. 29-Oct. 1, 2002.
 F. Bellotti, R. Berta, A. de Gloria, and M. Margarone, ”User Testing a Hypermedia Tour Guide,” IEEE Pervasive Computing, Vol. 1, Iss. 2, pp. 33-41, Apr.-Jun. 2002.
 G. D. Abowd, C. G. Atkeson, J. Hong, S. Long, R. Kooper, and M. Pinkerton, “Cyberguide: A Mobile Context-Aware Tour Guide,” ACM Wireless Networks, Vol.3, Iss. 5, Oct. 1997.
 S. Hsi, “The Electronic Guidebook: A Study of User Experiences using Mobile Web Content in a Museum Setting,” Proceedings of 2002 IEEE Wireless and Mobile Technologies in Education, Växjö, Sweden, pp.48-54, Aug. 29-30, 2002.
 “Radio Frequency Identification - RFID: A basic primer,” v.1.11, an AIM white paper, Sep. 28, 1999.
 P. M. Aoki, R. E. Grinter, A. Hurst, M. H. Szymanski, J. D. Thornton, and A. Woodruff , “Sotto Voce: Exploring the Interplay of Conversation and Mobile Audio Spaces”, Proceedings of the 2002 SIGCHI conference on Human factors in computing systems: Changing our world, changing ourselves, Minneapolis, Minnesota, USA , pp. 431-438, Apr. 2002.
 D. vom Lehn, C. Heath, and J. Hindmarsh, “Exhibiting Interaction: Conduct and Collaboration in Museums and Galleries,” in Symbolic Interaction, Vol. 24, pp. 189-216, Number 2, 2001.
 T. Koschmann, “Paradigm Shifts and Instructional Technology: An Introduction,” CSCL: Theory and Practice of An Emerging Paradigm, pp. 1-23. Mahwah, NJ: Lawrence Erlbaum Associates.
 E. Lehtinen, K. Hakkarainen, L. Lipponen, M. Rahikainen, and H. Muukkonen, “Computer Supported Collaborative Learning: A Review,” Computer supported collaborative learning in primary and secondary education. A final report for the European Commission, Project 2017, pp. 1-46. University of Nijmegen.
 J. Hsiao, “CSCL Theories,” http://www.edb.utexas.edu/csclstudent/Dhsiao/ theories.html.
 J. S. Brown, A. Collins, and P. Duguid, “Situated Cognition and the Culture of Learning,” http://www.ilt.columbia.edu/publications/papers/JohnBrown.html.
 V. Kumar, “Computer-Supported Collaborative Learning Issues for Research,” PhD. thesis, Department of Computer Science, University of Saskatchewan, 1996.
 C. E. Hmelo-Silver, “Collaborative Ways of Knowing: Issues in Facilitation,” Proceedings of 2002 Computer Support for Collaborative Learning Conference, Boulder, Colorado, USA, Jan. 2002.
 G. Stahl, “Contributions to a Theoretical Framework for CSCL,” Proceedings of 2002 Computer Support for Collaborative Learning Conference, Boulder, Colorado, USA, Jan. 2002.
 M. M. McManus, “Computer Supported Collaborative Learning,” in SIGGROUP Bulletin, Vol. 18, No.1, April 1997.
 M. C. Dorneich, P. M. Jones, “The Design and Implementation of a Learning Collaboratory,” Proceedings of 2000 IEEE International Conference on Systems, Man, and Cybernetics, pp. 1146-1151, Oct. 2000.
 L. Lipponen, “Exploring Foundations for Computer-supported Collaborative Learning,” Proceedings of 2002 Computer Support for Collaborative Learning Conference, Boulder, Colorado, USA, Jan. 2002.
 Roschelle and Teasley, “The Construction of Shared Knowledge in Collaborative Problem Solving,” Computer Supported Collaborative Learning, pp. 69-97. Springer-Verlag, Heidelberg, 1995.
 C. Crook, “Computers and the Collaborative experience of learning,” London: Routedge.
 Y. Engeström, “Interactive Expertise: Studies in Distributed Working Intelligence,” Research Bulletins, No. 83, Department of Education, University of Helsinki, 1992.
 “The SCORM Overview,” in Sharable Content Object Reference Model (SORM) Version 1.2, http://www.adlnet.org.
 A.K. Dey, D. Salber, and G. D. Abowd, “A Conceptual Framework and a Toolkit for Supporting the Rapid Prototyping of Context-Aware Applications,” Human-Computer Interaction Journal, Vol. 16, pp.97-116, 2001.