OTROCOL, Diana. 2016. “Hybrid Differential Equations With Maxima via Picard Operators Theory: Dedicated to Professor Ioan A. Rus on the Occasion of His 80th Anniversary”. Studia Universitatis Babeș-Bolyai Mathematica 61 (4):421-28. https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/5627.