Template:Rassadina, 1965b
- Rassadina, K.A. 1965. De Hypogymnia physodes (L.) Nyl. et H. duplicata (Sm.) Rassad. Novosti Sistematiki Nizshikh Rastenii (Novitates Systematicae Plantarum non Vascularium) 2: 198–205. RLL List # 55 / Rec.# 15403 – Recent Literature on Lichens Komarov Botanical Institute of the Russian Academy of Sciences