Executable Petri Nets: towards modelling and management of e-learning processes. - Hristo Indzhov; Dimitar Blagoev; George Totkov (CompSysTech, 2009)

A software frame for modelling and runtime control of adaptive testing. - Hristo Indzhov; Mariana Sokolova; George Totkov (CompSysTech, 2010)

E = MA2 (e-learning in a Moodle-based adaptive and accumulative system). - Hristo Indzhov; George Totkov; Rositsa Doneva (CompSysTech, 2011)

Adaptive e-learning system based on accumulative digital activities in revised Bloom's taxonomy. - Hristina Kostadinova; George Totkov; Hristo Indzhov (CompSysTech, 2012)

Supporting adaptive e-Learning: an approach based on open-source learning management systems. - Hristo Indzhov; Polina Zhelyazkova; George Totkov (CompSysTech, 2013)

Personalized Educational Paths through Self-Modifying Learning Objects. - George Pashev; George Totkov; Hristina Kostadinova; Hristo Indzhov (CompSysTech, 2016)