AGUDO-PEREGRINA AF, 2014, COMPUT HUM BEHAV, V31, P542, DOI 10.1016/J.CHB.2013.05.031;LLACH MPA, 2007, REV ESP LINGUIST APL, V20, P9;BARCROFT J, 2004, FOREIGN LANG ANN, V37, P200, DOI 10.1111/J.1944-9720.2004.TB02193.X;BARGEL BELA ANDREAS, 2012, INTERNATIONAL JOURNAL OF COMPUTER INFORMATION SYSTEMS AND INDUSTRIAL MANAGEMENT APPLICATIONS, V4, P228;BASTIAN M., 2009, P 3 INT C WEBLOGS SO, VVOLUME 3, P361, DOI DOI 10.1136/QSHC.2004.010033, 10.13140/2.1.1341.1520, DOI 10.13140/2.1.1341.1520;BISWAS P, 2008, ACCESSIBLE DESIGN DI;CAMILLERI V, 2013, LAK 13, P230;COBB T, 2007, LANG LEARN TECHNOL, V11, P38;COHEN A.D., 1980, SYSTEM, V8, P221;CRUZ J. C. D., 2014, 2014 9 IB C INF SYST, P1, DOI DOI 10.1109/CISTI.2014.6877097;DALGARNO B, 2010, BRIT J EDUC TECHNOL, V41, P10, DOI 10.1111/J.1467-8535.2009.01038.X;DEVELOPMENT CORE TEAM R, 2004, R LANG ENV STAT COMP;GU YQ, 1996, LANG LEARN, V46, P643, DOI 10.1111/J.1467-1770.1996.TB01355.X;HEER J, 2010, COMMUN ACM, V53, P59, DOI 10.1145/1743546.1743567;KAPLAN AM, 2009, BUS HORIZONS, V52, P563, DOI 10.1016/J.BUSHOR.2009.07.002;KELLY P, 1991, IRAL-INT REV APPL LI, V29, P134;KERN RG, 1989, MOD LANG J, V73, P135, DOI 10.2307/326569;KHOKHAR, 2015, GEPHI COOKBOOK;KIRSTEN M, 2001, RELATIONAL DATA MINING, P213;KOJIC-SABO I, 1999, MOD LANG J, V83, P176, DOI 10.1111/0026-7902.00014;KRASHEN S, 1985, 2 LANGUAGE ACQUISITI;KROLL J. F., 1988, PRACTICAL ASPECTS ME, V2, P389;KUNCHEVA LI, 1998, IEEE T SYST MAN CY C, V28, P160, DOI 10.1109/5326.661099;LAN Y. -J., 2013, AUSTRALASIAN J ED TE, V29, DOI 10.14742/AJET.144;LAN Y. J., 2015, ANNOUNCEMENTS CALL P, V16;LAN YJ, 2013, J ED TECHNOLOGY SOC, V16, P1;LAN YJ, 2015, ETR&D-EDUC TECH RES, V63, P671, DOI 10.1007/S11423-015-9380-Y;LI P, 2015, BLACKW HBK LINGUIST, P511;LI P, 2014, BILING-LANG COGN, V17, P673, DOI 10.1017/S1366728913000606;LIN CF, 2013, COMPUT EDUC, V68, P199, DOI 10.1016/J.COMPEDU.2013.05.009;LINCOLN M. D., 2014, ADJACENCY MATRIX PLO;MALT BC, 2015, J MEM LANG, V82, P86, DOI 10.1016/J.JML.2015.03.001;MARTENS J, 2012, COMPUT HUM BEHAV, V28, P809, DOI 10.1016/J.CHB.2012.01.008;MEARA PAUL, 1980, LANGUAGE TEACHING LI, V13, P221, DOI DOI 10.1017/S0261444800008879;MINOVIC M, 2013, FIRST INTERNATIONAL CONFERENCE ON TECHNOLOGICAL ECOSYSTEM FOR ENHANCING MULTICULTURALITY (TEEM'13), P245, DOI 10.1145/2536536.2536574;OTTE E, 2002, J INF SCI, V28, P441, DOI 10.1177/016555150202800601;OXFORD R., 1990, LANGUAGE LEARNING ST;OXFORD R. L., 2003, LANGUAGE LEARNING ST;PERERA I, 2012, INT J EMERG TECHNOL, V7, P25, DOI 10.3991/IJET.V7I3.2046;RANKIN Y.A., 2006, EUROGRAPHICS, V25, P33;RODGERS M. K., 2011, P 33 ANN M COGN SCI, P2770;SAGARRA N, 2006, MOD LANG J, V90, P228, DOI 10.1111/J.1540-4781.2006.00394.X;SCARCELLA R.C., 1992, TAPESTRY LANGUAGE LE;SCHNEIDER W., 2012, E PRIME USERS GUIDE;SMIDT E., 2004, COMPUTER ASSISTED LANGUAGE LEARNING, V17, P517, DOI 10.1080/0958822042000319692;SNOW MA, 2005, HANDBOOK OF RESEARCH IN SECOND LANGUAGE TEACHING AND LEARNING, P693;TASHIRO J, 2010, LECT NOTES COMPUT SC, V6248, P186, DOI 10.1007/978-3-642-14657-2_18;WALKOWIAK S, 2015, COMPUT HUM BEHAV, V45, P402, DOI 10.1016/J.CHB.2014.12.041;WARBURTON S, 2009, BRIT J EDUC TECHNOL, V40, P414, DOI 10.1111/J.1467-8535.2009.00952.X;WONG PC, 2013, IEEE COMPUT GRAPH, V33, P88, DOI 10.1109/MCG.2013.66;ZINSZER BD, 2014, FRONT PSYCHOL, V5, DOI 10.3389/FPSYG.2014.01203