Sajaniemi, Jorma, and Marja Kuittinen. “From Procedures to Objects: A Research Agenda for the Psychology of Object-Oriented Programming Education”. Human Technology 4, no. 1 (May 1, 2008): 75–91. Accessed July 16, 2026. https://ht.csr-pub.eu/index.php/ht/article/view/68.