Sergejeva, Natalija, and Sigita Pečiulytė. “On Fučík Type Spectrum for Problem With Integral Nonlocal Boundary Condition”. Nonlinear Analysis: Modelling and Control 24, no. 2 (February 1, 2019): 261–278. Accessed April 29, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/12902.