Kamenskiĭ, Mikhail I., Paolo Nistri, and Paul Raynaud de Fitte. 2019. “A Periodic Bifurcation Problem Depending on a Random Variable”. Topological Methods in Nonlinear Analysis 54 (2B):979-99. https://apcz.umk.pl/TMNA/article/view/TMNA.2019.043.