Kron, K. A., and E. A. Powell. “MOLECULAR SYSTEMATICS OF RHODODENDRON SUBGENUS TSUTSUSI (RHODOREAE, ERICOIDEAE, ERICACEAE)”. Edinburgh Journal of Botany, vol. 66, no. 1, Mar. 2009, pp. 81-95, https://doi.org/10.1017/S0960428609005071.