Comparative Morphological and Anatomical Study of Onosma caucasica Levin. ex M. Pop. and Onosma sericea Willd. (Boraginaceae Juss.),
Daironas, Janna Vladimirov, Serebryanaya Fatima Kazbekovna, and karov Ifrat Nazimovich
, Pharmacognosy Journal, 2nd July 2014, Volume 6, Issue 5, p.22-28, (2014)