Orlovskiy, V. F., and A. V. Zharkova. 2013. “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). https://doi.org/10.14739/2310-1210.2012.6.18321.