Template:Wittrock & Nordstedt, 1889
- [Wittrock, V.B. & Nordstedt, C.F.O.] 1889. Literatur-öfversigt [Literature review]. Algae aquae dulcis exsiccatae praecipue Scandinavicae quas adjectis algis marinis chlorophyllaceis et phycochromaceis.... Botaniska Notiser 1889(4): 157–171. BHL