AAS B., 2011, VIRTUAL WORLDS METAV, P88;ADRIAN ANGEL, 2008, COMPUTER LAW AND SECURITY REPORT, V24, P366, DOI 10.1016/J.CLSR.2008.03.005;AGUIRRE S., 2008, P 38 ASEE IEEE FRONT, PF4D19;AHMED F, 2005, P 7 WORKSH MULT SEC, P137;ALLISON C., 2012, P 2 EUR IMM ED SUMM, P1;ALVES PAULO, 2010, CAMPUS-WIDE INFORMATION SYSTEMS, V27, P79, DOI 10.1108/10650741011033053;ANWAR M., 2006, P 2006 INT C PRIV SE;ANWAR M, 2012, IEEE T LEARN TECHNOL, V5, P62, DOI 10.1109/TLT.2011.23;BAILIE J., 2009, J ONLINE LEARNING TE, V5, P230;BARISCH M., 2009, P 5 ACM WORKSH DIG I, P45, DOI 10.1145/1655028.1655040;BARON L, 2005, TECHTRENDS, V49, P40, DOI 10.1007/BF02773970;BEDFORD W., 2009, J ONLINE LEARNING TE, V5, P197;BELL M., 2009, GERMAN COUNCIL SOCIA, V40;BHARGAV-SPANTZEL A, 2007, IEEE SECUR PRIV, V5, P55, DOI 10.1109/MSP.2007.46;BHATTI R, 2007, COMMUN ACM, V50, P81, DOI 10.1145/1216016.1216025;BOON S, 2009, EDUC MEDIA INT, V46, P99, DOI 10.1080/09523980902933565;BUGEJA M., 2007, CHRONICLE HIGHER ED;BURDEN DJH, 2011, IEEE INTERNET COMPUT, V15, P40, DOI 10.1109/MIC.2011.79;CLARK-CASEY J., 2010, THESIS U OXFORD OXFO;CLAUAND S, 2006, P 2 ACM WORKSH DIG I P 2 ACM WORKSH DIG I, P55;CRUZ G, 2013, ADV INTELL SYST, V206, P1117, DOI 10.1007/978-3-642-36981-0_106;DALGARNO B., 2011, CHANGING DEMANDS CHA, P316;EUROPEAN COMMISSION COMMUNICATIONS NETWORKS CONTENT AND TECHNOLOGY, 2013, EDUGAIN SERV;FOX MR, 2010, HUM-COMPUT INT-SPRIN, P87, DOI 10.1007/978-1-84882-825-4_7;FREUDENTHALER S., 2011, THESIS GRAZ U TECHNO;GABRIELS K., 2011, VIRTUAL WORLDS METAV, P306;HAMMERLE L, 2006, CESNET CONFERENCE 2006: FIRST CESNET CONFERENCE ON ADVANCED COMMUNICATIONS AND GRIDS, P115;HENDAOUI A, 2008, IEEE INTERNET COMPUT, V12, P88, DOI 10.1109/MIC.2008.1;HOWLETT J., 2010, IETF 77 M AN CA;HUNT, 2007, TEXAS REV ENTERTAINM, V9, P141;INCOMMON, 2013, AB INC;JOYCE R, 1990, COMMUN ACM, V33, P168, DOI 10.1145/75577.75582;KALLELA J., 2008, TECHNICAL REPORT;KLUGE STACY, 2008, JOURNAL OF ISSUES IN INFORMING SCIENCE AND INFORMATION TECHNOLOGY JOURNAL, V5, P127;LACHAPELLE N., 2007, EDUCAUSE CONNEC 0718;LEE C., 2007, P 5 AUSTR INF SEC MA, P142;LINDEN M., 2005, COMPUTATIONAL METHOD, V11, P109;LINDSAY D., 2010, HUMANITY CYBERNETIC, P147;LIVINGSTONE DANIEL, 2008, UPGRADE: THE EUROPEAN JOURNAL FOR THE INFORMATICS PROFESSIONAL, V9, P8;LOPES CV, 2011, IEEE INTERNET COMPUT, V15, P22, DOI 10.1109/MIC.2011.77;LORENTZ P., 2011, VIRTUAL WORLDS METAV, P206;MADEIRA A., 2010, REV IBER SIST TECNOL, V5, P87;MADSEN P., 2005, P 2005 WORKSH DIG ID, P77, DOI 10.1145/1102486.1102500, DOI 10.1145/1102486.1102500;MESSINGER PR, 2009, DECIS SUPPORT SYST, V47, P204, DOI 10.1016/J.DSS.2009.02.014;MORGADO L., 2013, P 21 EUR C INF SYST, P1;MORGADO L., 2009, J VIRTUAL WORLDS RES, V3, P4;OLT M., 2009, MERLOT J ONLINE LEAR, V5, P222;ONASHOGA ADEBUKOLA, 2014, INTERNATIONAL JOURNAL OF COMPUTER NETWORK AND INFORMATION SECURITY, V6, P1, DOI 10.5815/IJCNIS.2014.03.01;PALOMAKI E, 2009, THESIS HELSINKI U TE;PERERA I, 2012, INT J EMERG TECHNOL, V7, P25, DOI 10.3991/IJET.V7I3.2046;ROBERTS C., 2009, J ONLINE LEARNING TE, V5, P182;ROWE M, 2010, P 4 WORKSH INF CRED, P35;SCHWARTZ M., 2010, EDUCAUSE Q, V33;SHIM SSY, 2005, COMPUTER, V38, P120, DOI 10.1109/MC.2005.408;SLOODLE, 2013, REG ENR;SMITH DON, 2008, NETWORK SECURITY, V2008, P7, DOI 10.1016/S1353-4858(08)70051-5;THOMPSON CW, 2011, IEEE INTERNET COMPUT, V15, P60, DOI 10.1109/MIC.2011.15;VILELA ANDREAS, 2010, 2010 2ND INTERNATIONAL CONFERENCE ON GAMES AND VIRTUAL WORLDS FOR SERIOUS APPLICATIONS (VS-GAMES 2010), P167, DOI 10.1109/VS-GAMES.2010.30;WHITSON JENNIFER, 2009, INTERACTIONS, V16, P41, DOI 10.1145/1487632.1487642;WINDHAM C., 2005, EDUCAUSE REV, V40, P42;ZHANG H., 2007, P WORLD C ED MULT HY, P4415