ICT in STEM Education in Bulgaria. - Valentina Terzieva; Elena Paunova-Hubenova; Stanislav Dimitrov; Yordanka Boneva (ICL (1), 2018)

Personalization of Educational Video Games in APOGEE. - Valentina Terzieva; Elena Paunova-Hubenova; Boyan Bontchev (ArtsIT/DLI, 2019)

Teachers' Preferable Attributes of E-Learning Resources. - Valentina Terzieva; Elena Paunova-Hubenova; Katia Todorova; Petia Kademova-Katzarova (ArtsIT/DLI, 2019)

Personalization of serious games for learning. - Boyan Bontchev; Valentina Terzieva; Elena Paunova-Hubenova (Interact. Technol. Smart Educ., 2021)

Ready to Play - A Comparison of Four Educational Maze Games. - Elena Paunova-Hubenova; Yavor Dankov; Valentina Terzieva; Dessislava Vassileva; Boyan Bontchev; Albena Antonova (NiDS, 2022)