ChuikoS. M. “Bifurcation of Solutions of a Linear Fredholm Boundary-Value Problem”. Ukrains’kyi Matematychnyi Zhurnal 59, no. 8 (August 25, 2007): 1148–1152. Accessed September 1, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3378.