S.  Janssens, Geuten, K., Yuan, Y. M., Song, Y., Kupfer, P., and Smets, E., ?Phylogenetics of Impatiens and Hydrocera (Balsaminaceae) using chloroplast atpB-rbcL spacer sequences?, Syst. Bot, vol. 31, no. 1, pp. 171 - 180, 2006.

Y. M.  Yuan, Song, Y., Geuten, K., Rahelivololona, E., Wohlhauser, S., Fischer, E., and Smets, E., ?Phylogeny and biogeography of Balsaminaceae inferred from ITS sequences?, Taxon, vol. 53, no. 2, pp. 391 - 403, 2004.