AGARWAL, Anshu and BASAK, Biplab. A classification of semi-equivelar gems of PL d-manifolds on the surface with Euler characteristic -1. Topological Methods in Nonlinear Analysis. Online. 14 June 2025. Vol. 65, no. 2, pp. 765 - 783. [Accessed 20 December 2025]. DOI 10.12775/TMNA.2024.053.