Maalaoui, A. and Martino, V. (2012) “Existence and multiplicity results for a non-homogeneous fourth order equation”, Topological Methods in Nonlinear Analysis, 40(2), pp. 273–300. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2012.032 (Accessed: 27 July 2024).