Nurimov , P. B., U. K. qizi Doniyorova, and M. Y. qizi Avgonova. “CHANGES IN THE LIVER OF RABBITS IN THE DEFICIENCY OF THE TRACE ELEMENT COBALT”. GOLDEN BRAIN, vol. 1, no. 6, Mar. 2023, pp. 35-38, https://researchedu.org/index.php/goldenbrain/article/view/1940.