Taxon - Odkazy a literatura
Maletz J. (2014): The classification of the Pterobranchia (Cephalodiscida and Graptolithina), Bulletin of Geosciences, volume 89, 3 [jako Skalograptus Tsegelniuk, 1976]
Maletz J. (2014): The classification of the Pterobranchia (Cephalodiscida and Graptolithina), Bulletin of Geosciences, volume 89, 3 [jako Skalograptus Tsegelniuk, 1976]