@article {4692,
	title = {New Malayan plants},
	journal = {Journal of the Straits Branch of the Royal Asiatic Society},
	volume = {41},
	year = {1904},
	month = {1904///},
	pages = {31 - 51},
	author = {Ridley, H. N.}
}
@article {3063,
	title = {Ueber das Prothallium und die keimpflanze von Ophioglossum vulgatum L.},
	journal = {Bot. Zeitung},
	volume = {62},
	year = {1904},
	month = {1904///},
	pages = {227 - 248},
	author = {Bruchmann, H.}
}
@article {3019,
	title = {On a prothallus provisionally referred to Psilotum},
	journal = {Ann. Bot.},
	volume = {18},
	year = {1904},
	month = {1904///},
	pages = {571 - 577},
	author = {Lang, W. H.}
}
