Sergejeva, N. “Fučik Spectrum for the Second Order BVP With Nonlocal Boundary Condition”. Nonlinear Analysis: Modelling and Control 12, no. 3 (July 25, 2007): 419–429. Accessed August 28, 2026. https://zurnalai.vu.lt/nonlinear-analysis/article/view/14704.