Rehm, “Ascomyceten,” fasc. i.-iv.
Weinmann, “Hymeno-et Gasteromycetes,” in “Imp. Ross” (1836); Weinmann, “Enumeratio Stirpium, in Agro Petropolitano” (1837).
Karsten, “Fungi in insulis Spetsbergen collectio” (1872); Karsten, “Monographia Pezizarum fennicarum” (1869); Karsten, “Symbolæ ad Mycologiam fennicam” (1870).
Rabenhorst, “Deutschlands Kryptogamen Flora” (1844); Wallroth, “Flora Germanica” (1833); Sturm, “Deutschlands Flora, iii. die Pilze” (1837, &c.).
Fuckel, “Symbolæ mycologicæ” (1869).