Orlovskiy, V. F., and A. V. Zharkova. “Influence of Vitamin B12 on Homocysteine Level in Patients With Comorbid Course of Coronary Heart Disease and Gastrointestinal Acid-Related Diseases”. Zaporozhye Medical Journal, no. 6 (October 22, 2013). Accessed December 20, 2024. http://zmj.zsmu.edu.ua/article/view/18321.