Yakubova D. M., and Qodirova N. A. “CAUSES AND EARLY DIAGNOSIS OF VITAMIN B12 DEFICIENCY”. Web of Medicine: Journal of Medicine, Practice and Nursing 3, no. 3 (March 7, 2025): 13–18. Accessed June 11, 2025. http://webofjournals.com/index.php/5/article/view/3476.