CLAPP, Monica and FERNÁNDEZ, Juan Carlos. Multiple solutions to the Bahri-Coron problem in the complement of a thin tubular neighbourhood of a manifold. Topological Methods in Nonlinear Analysis. Online. 1 December 2015. Vol. 46, no. 2, pp. 1119 - 1138. [Accessed 5 July 2024]. DOI 10.12775/TMNA.2015.085.