@article {springerlink:10.1007/BF02873610,
	title = {Upper carboniferous and lower permian conifers},
	journal = {The Botanical Review},
	volume = {16},
	year = {1950},
	note = {10.1007/BF02873610},
	pages = {258-282},
	publisher = {Springer New York},
	issn = {0006-8101},
	doi = {doi:10.1007/BF02873610},
	url = {http://dx.doi.org/10.1007/BF02873610},
	author = {Florin, Rudolf}
}
