BASAK, Biplab, GUPTA, Raju Kumar and SARKAR, Sourav. A characterization of $g_2$-minimal normal 3-pseudomanifolds with at most four singularities. Topological Methods in Nonlinear Analysis. Online. 21 September 2024. Vol. 64, no. 2, pp. 479 - 491. [Accessed 16 December 2025]. DOI 10.12775/TMNA.2024.012.