Open learning environment and instruction system (OLEIS). - Alex Davidovic; Elena Trichina (ITiCSE, 1998)

Structural example-based adaptive tutoring system (poster session) (SEATS). - Alex Davidovic; James R. Warren; Elena Trichina (ITiCSE, 2000)

Learning benefits of structural example-based adaptive tutoring systems. - Alex Davidovic; James R. Warren; Elena Trichina (IEEE Trans. Educ., 2003)