For citations:

Vologdina I... Safety, effect anti tolerance of metoprolol in the treatment of elderly and old patients of cardiological profile. "Arterial’naya Gipertenziya" ("Arterial Hypertension"). 2006;12(1):52-55. (In Russ.) https://doi.org/10.18705/1607-419X-2006-12-1-52-55