Rynne, B. P. (2010) “Eigenvalue criteria for existence of positive solutions of second-order, multi-point, $p$-Laplacian boundary value problems”, Topological Methods in Nonlinear Analysis, 36(2), pp. 311–326. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2010.038 (Accessed: 17 January 2022).