World Register of Marine Species (WoRMS)
Guiry, M.D. & Guiry, G.M. (2026). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Champia japonica Okamura, 1931. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=372278 on 2026-08-03
Okamura, K. (1931). Icones of Japanese algae. Vol. VI pp. 39-62 (English), 39-60 (Japanese), Plates CCLXXI-CCLXXX. Tokyo: published by the author.