English: S.YENDO&H,MORITA: Notes on the Gencra Comptoniphyllum and Liquidamber,Sci,Rept.Tohok.Imp.Univ.Sendai,2 ser.vol.XV.1932.p.41-53,t.5-7
Japanese: 遠藤誠道氏及森田日子次氏 Comptoniphyllum及び化石楓