Castro, A., Costa, D. G. and Shivaji, R. (2017) “Multiple positive solutions for a class of variational systems”, Topological Methods in Nonlinear Analysis, 50(1), pp. 1–8. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2017.016 (Accessed: 3 July 2024).