Reference

Gianni Sacchetti, Mauro Ballero, M. Serafini, M. Muzzoli, Barbara Tosi, Ferruccio Poli (2003): Morphological and Histochemical Investigation on Glandular Trichomes of Orobanche ramosa subsp. nana (Orobanchaceae). – Phyton, Annales Rei Botanicae, Horn – 43_1: 207 - 214.