Template:Keissler, 1926a
- Keissler, C. 1926. Schedae ad „Kryptogamas Exsiccatas“ editae a Museo historiae naturalis Vindobonensi (olim Museum Palatinum). Cent. XXX. Annalen des Naturhistorischen Museums in Wien 40: 130–150. Mattick Rec.# 27861 – Recent Literature on Lichens Zobodat (PDF)