Basdouri, O., A. Braghtha, and S. Hammami. 2020. “The Second Cohomology Spaces $\mathcal{K}(2)$ With coefficents in the Superspace of Weighted Densities”. Ukrains’kyi Matematychnyi Zhurnal 72 (10): 1323-34. https://doi.org/10.37863/umzh.v72i10.6030.