Linking procedural and conceptual mathematical knowledge through CAL. - Djordje Kadijevich; Lenni Haapasalo (J. Comput. Assist. Learn., 2001)

Factors that influence student teacher's interest to achieve educational technology standards. - Djordje Kadijevich; Lenni Haapasalo (Comput. Educ., 2008)

Responding to the challenges of instrumental orchestration through physical and virtual robotics. - Lenni Haapasalo; Peter Samuels (Comput. Educ., 2011)