SENANAYAKE, S.A.M.A.N.S., K.N.H.P. LIYANEGE, and P.R. DADIGAMUWA. 2005. “Factors Related to Student Unsuccessfulness in Engineering Programmes in Distance Education”. Asian Journal of Distance Education 3 (1). https://asianjde.com/ojs/index.php/AsianJDE/article/view/67.