World Register of Marine Species (WoRMS)
Nemys eds. (2026). Nemys: World Database of Nematodes. Sphaerocephalum Filipjev, 1918. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=2493 on 2026-08-01
Filipjev, I. N. (1918). Free-living marine nematodes of the Sevastopol area. Transactions of the Zoological Laboratory and the Sevastopol Biological Station of the Russian Academy of Sciences. Series II No 4 (Issue I & II) (Translated from Russian).