Clapp, Monica, and Juan Carlos Fernández. “Multiple Solutions to the Bahri-Coron Problem in the Complement of a Thin Tubular Neighbourhood of a Manifold”. Topological Methods in Nonlinear Analysis 46, no. 2 (December 1, 2015): 1119–1138. Accessed July 5, 2024. https://apcz.umk.pl/TMNA/article/view/TMNA.2015.085.