Harms, J. (1993). Check list of species (algae, invertebrates and vertebrates) found in the vicinity of the island of Helgoland (North Sea, German Bight): a review of recent records.
Helgoländer Meeresunters. 47: 1-34. [p. 25, tab. 3: Gastrosaccus spinifer, Mysis relicta, Praunus inermis, Schistomysis kervillei, Schistomysis spiritus.