ÇETİNBAŞ, A., and M. ÜNAL. “Comparative Ontogeny of Hermaphrodite and Pistillate Florets in Helianthus Annuus L. (Asteraceae)”. Notulae Scientia Biologicae, vol. 4, no. 2, May 2012, pp. 30-40, doi:10.15835/nsb427576.