Basdouri, O., A. Braghtha, and S. Hammami. “The Second Cohomology Spaces $\mathcal{K}(2)$ With coefficents in the Superspace of Weighted Densities”. Ukrains’kyi Matematychnyi Zhurnal 72, no. 10 (October 8, 2020): 1323-1334. Accessed June 25, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/6030.