Pollen morphology in Saxifraga (Saxifragaceae) from Ny.lesund,Svalbard, Arctic, and its taxonomic significance
YAO Yifeng , Bera Subir, Ferguson David Kay, LI Chengsen
Advances in Polar Science . 2014, (2): 105 -112 .  DOI: 10.13679/j.advps.2014.2.00105