Rudik, Galina.
" Morphological structure of inflorescences of Agastache breviflora (A. Gray) Epling, A. rugosa (Fisch. & C.A. Mey.) Kuntze, and A. rupestris (Greene) Standl. (family Lamiaceae) ex situ" <em>Modern Phytomorphology</em> [Online], Volume 10(1 June 2016)