Knudsen, J.T. 1994b. Floral scent variation in the Pyrola rotundifolia complex in Scandinavia and western Greenland. Nordic J. Bot. 14:277-282. |
|
Knudsen, J.T., and Tollsten, L. 1991. Floral scent and intrafloral scent differentiation in Moneses and Pyrola (Pyrolaceae). Pl. Syst. Evol. 177:81-91. |
|