Chukwunenye Joy Nkiruka, and Nwokocha, Cecily O. “Web-Based Interactive Problem-Solving Tutorial As a Tool for Conceptual Change Among Physics Students”. The African Journal of Behavioural and Scale Development Research, vol. 2, no. 1, Feb. 2020, doi:10.58579/AJB-SDR/2.1.2020.46.