Mayr, G. 2004. "A partial skeleton of a new fossil loon (Aves, Gaviiformes) from the early Oligocene of Germany with preserved stomach content." Journal of Ornithology145: 281–286. DOI: 10.1007/s10336-004-0050-9PDf fulltextArchiviato il 24 settembre 2015 in Internet Archive.
Mayr, G. 2004. "A partial skeleton of a new fossil loon (Aves, Gaviiformes) from the early Oligocene of Germany with preserved stomach content." Journal of Ornithology145: 281–286. DOI: 10.1007/s10336-004-0050-9PDf fulltextArchiviato il 24 settembre 2015 in Internet Archive.
Mayr, G. 2004. "A partial skeleton of a new fossil loon (Aves, Gaviiformes) from the early Oligocene of Germany with preserved stomach content." Journal of Ornithology145: 281–286. DOI: 10.1007/s10336-004-0050-9PDf fulltextArchiviato il 24 settembre 2015 in Internet Archive.