Template:Fries, 1821a
- Fries, E.M. 1821. Systema mycologicum, sistens fungorum ordines, genera et species, huc usque cognitas, quas ad normam methodi naturalis determinavit, disposuit atque descripsit Elias Fries. Vol. I: [I]–[LIX] + [1]–520. Ex Officina Berlingiana, Lundae. BHL