@book {4503,
	title = {Bulletin de la Societe Botanique de France: Memoires},
	volume = {1},
	year = {1905},
	author = {H. Christ}
}
@article {4488,
	title = {Dryopteridaceae},
	journal = {Journal de Botanique},
	volume = {21},
	year = {1908},
	author = {H. Christ}
}
