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

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

Using the Analytic Hierarchy Process for LMS selection. - Valentina Petrova (CompSysTech, 2019)