M.  Kawakatsu and Mitchell, R. W., ?Redescription of a North American freshwater planarian, Seidlia remota (Smith, 1988), with taxonomic notes on Seidlia and Polycelis species from the Far East and Central Asia?, Bulletin of the Fuji Women's College, vol. 36, pp. 95-110, 1998.

R.  Sluys, Smolders, I., Kawakatsu, M., Pietsch, T. W., and Kuranishi, R. B., ?Freshwater Planarians (Platyhelminthes: Tricladida: Planariidae) from the Kuril Islands and Kamchatka?, Species Diversity, vol. 14, pp. 307-322, 2009.