Precup, Radu, and Jorge Rodríguez-López. “Positive Solutions for Phi-Laplace Equations With Discontinuous State-Dependent Forcing Terms”. Nonlinear Analysis: Modelling and Control 24, no. 3 (April 23, 2019): 447–461. Accessed April 29, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/12884.