“SYNTHESIS АND PHOTOCHEMICАL STUDY OF THE HOMOLEPTIC COMPLEX COMPOUND OF COBАLT(II) WITH 6,6-DICYАNO-2,2-BIPYRIDINE”. Scientific Journal of the Fergana State University, vol. 30, no. 4, Aug. 2024, p. 100, https://journal.fdu.uz/index.php/sjfsu/article/view/4225.