Castro, A. and Finan, M. B. (1999) “Existence of many sign-changing nonradial solutions for semilinear elliptic problems on thin annuli”, Topological Methods in Nonlinear Analysis, 13(2), pp. 273–279. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.1999.014 (Accessed: 28 March 2024).