Madasheva, A. G., and K. M. Abdiev. “Blood Transfusion Therapy in Patients With Vitamin B12 Deficiency Anemia After Resection of 2/3 of the Stomach”. Science and Education, vol. 4, no. 5, June 2023, pp. 407-12, https://openscience.uz/index.php/sciedu/article/view/5735.