The Study of External Signs, Microscopy and Chemical Composition of Medicinal Plant Materials of Ver?nica beccabunga L. Herb, Strelyaeva, Angelina V., Larina Olga A., Antsyshkina Alla M., Kuznetsov Roman M., Bondar Alina A., and Sorokin Vladimir A. , Pharmacognosy Journal, March 2020, Volume 12, Issue 2, p.391-403, (2020)