Two-dimensional knowledge model for learning control and competence mappingKukk, Vello; Umbleja, Kadri; Jaanus, MartinLearning Technology for Education in Cloud : 4th International Workshop, LTEC 2015, Maribor, Slovenia, August 24-28, 2015 : proceedings2015 / p. 16-27 : ill http://dx.doi.org/10.1007/978-3-319-22629-3_2