Decision support systems - new approaches for realization. - Georgi Penchev; Margarita Todorova (CompSysTech, 2000)

Estimation of the interactions of multimedia streams and objects by applying theory of graphs. - Jordan Shterev; Margarita Todorova (CompSysTech, 2000)

Learning objects. - Margarita Todorova; Valentina Petrova (CompSysTech, 2003)

A model for describing and structuring learning objects. - Valentina Petrova; Margarita Todorova (CompSysTech, 2004)

Service quality of multimedia streams and objects. - Jordan Shterev; Margarita Todorova (CompSysTech, 2007)

Structuring multimedia scenarioes according to the different learning modalities. - Donika Valcheva; Margarita Todorova; Teodor Kalushkov (EATIS, 2009)

3D model of e-learning. - Donika Valcheva; Margarita Todorova; Oleg Asenov (CompSysTech, 2010)

A 3D model for adaptive multi-lingual online assessment. - Margarita Todorova; Oleg Asenov; Donika Valcheva (CompSysTech, 2014)