Phytochemical investigation and reproductive capacity of the bulgarian endemic plant species marrubium friwaldskyanum boiss. (lamiaceae)

Valtcho D. Zheljazkov, Ivanka B. Semerdjieva, Jan F. Stevens, Wenbin Wu, Charles L. Cantrell, Elina Yankova-Tsvetkova, Lyubka H. Koleva-Valkova, Albena Stoyanova, Tess Astatkie