AL-ANSARI A, 2015, SAUDI DENT J, V27, P57, DOI 10.1016/J.SDENTJ.2014.11.011;AL-SAREM M, 2015, ARXIV151104026;AUVINEN T., 2014, P 14 KOL CALL INT C, P25;AUVINEN TAPIO, 2015, ED TECHNOLOGIES SUPP;AYRAMO S., 2006, JYVASKYLA STUDIES CO, V63;BILETSKIY Y, 2009, EXPERT SYST APPL, V36, P4508, DOI 10.1016/J.ESWA.2008.05.011;BINH N., 2008, VNU J SCI NAT SCI TE, V24, P110;BRUSILOVSKY P., 1998, P WORKSH WWW BAS TUT;CHATTI MA, 2012, INT J TECHNOL ENHANC, V4, P318, DOI 10.1504/IJTEL.2012.051815;CHEN C.-M, 2008, IEEE INT C CYB INT S;CHEN CM, 2008, COMPUT EDUC, V51, P787, DOI 10.1016/J.COMPEDU.2007.08.004;CHEN CM, 2009, BRIT J EDUC TECHNOL, V40, P1028, DOI 10.1111/J.1467-8535.2008.00892.X;CHEN CM, 2009, EXPERT SYST APPL, V36, P8816, DOI 10.1016/J.ESWA.2008.11.026;CHEN CM, 2005, COMPUT EDUC, V44, P237, DOI 10.1016/J.COMPEDU.2004.01.006;DOUGHERTY SARAH B., 2007, HIGH EDUC REV, V4, P63;DREZNER Z, 2001, FACILITY LOCATION AP;DROZD D. S., 2010, THESIS;FEGHALI T, 2011, EDUC TECHNOL SOC, V14, P82;FUNG A, 2000, P IFIP INT C ED US T;HENDERSON LK, 2015, INT J ADV COMPUT SC, V6, P233;HUANG MJ, 2007, EXPERT SYST APPL, V33, P551, DOI 10.1016/J.ESWA.2006.05.019;HUBER P., 2011, ROBUST STAT;HWANG GJ, 2010, COMPUT EDUC, V54, P404, DOI 10.1016/J.COMPEDU.2009.08.024;IDRIS N., 2009, INT J ADV SOFT COMPU, V1, P49;JAIN AK, 2010, PATTERN RECOGN LETT, V31, P651, DOI 10.1016/J.PATREC.2009.09.011;KAIHLAVIRTA A, 2015, STUD CONTIN EDUC, V37, P99, DOI 10.1080/0158037X.2014.983436;LATORRE-NAVARRO E. M, 2015, EDITORIAL PREFACE, V6;LEE MG, 2001, COMPUT EDUC, V36, P121, DOI 10.1016/S0360-1315(00)00046-4;LEUNG C. M, 2010, EDUCAUSE Q, V33, PN4;LIU C.-L, 2008, 16 INT C COMP ED C 2, P249;MINAEI-BIDGOLI B, 2004, THESIS;NOAMAN AY, 2015, PROCEDIA COMPUT SCI, V65, P358, DOI 10.1016/J.PROCS.2015.09.097;PAPANIKOLAOU KA, 2002, COMPUT EDUC, V39, P333, DOI 10.1016/S0360-1315(02)00067-2;RABIE W., 2014, 2 INT C RES SCI ENG, P21;SAARELA M., 2014, P 7 INT C ED DAT MIN, P60;SAARELA M., 2015, JEDM J ED DATA MIN, V7, P3;SAARELA M., 2015, P EUR S ART NEUR NET, P337;SAARELA M., 2015, P 8 INT C ED DAT MIN, P156;SAARELA M, 2017, STUD SYST DECIS CONT, V94, P229, DOI 10.1007/978-3-319-52977-6_8;SANDVIG J., 2005, TR05015 DEPAUL U;SCHIAFFINO S, 2008, COMPUT EDUC, V51, P1744, DOI 10.1016/J.COMPEDU.2008.05.008;SMEETON N.C., 2016, APPL NONPARAMETRIC S;TANG T.Y., 2005, INT J ELEARNING, V4, P105;TUTTLE K. N., 2000, NEW DIRECTIONS HIGHE, V2000, P15;WALLDEN L. J., 2016, JYVASKYLA STUDIES CO;WEN F. L. S. L. D., 2015, INT J ADV COMPUTER S, V6;WERGHI N., 2009, INT J BUS INF SYST, V5, P1;ZAKI M., 2014, DATA MINING ANAL FUN