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)

Application of semantic technologies in bibliographic databases. - Tsvetanka Georgieva-Trifonova; Kaloyan Zdravkov; Donika Valcheva (Electron. Libr., 2020)