@article{Chen Zhi-duan:1, author = {Chen Zhi-duan}, title = {Phylogeny and Phytogeography of the Betulaceae (to be continued)}, publisher = {J Syst Evol}, year = {1994}, journal = {Journal of Systematics and Evolution}, volume = {32}, number = {1}, eid = {1}, numpages = {30}, pages = {1}, keywords = {