Gardner, M. (2010) “Pinaceae - drawings and descriptions of the genera Abies, Cedrus, Pseudolarix, Keteleeria, Nothotsuga, Tsuga, Cathaya, Pseudotsuga, Larix and Picea. A. Farjon”., Edinburgh Journal of Botany, 50(1), pp. 121–122. doi:10.1017/S0960428600000767.