@book {4503,
	title = {Bulletin de la Societe Botanique de France: Memoires},
	volume = {1},
	year = {1905},
	author = {H. Christ}
}
@article {4405,
	title = {Les collections de Fougeres de la Chine au Museum},
	journal = {Bulletin de l{\textquoteright}Acad{\'e}mie Internationale de G{\'e}ographie Botanique},
	volume = {52},
	year = {1905},
	author = {H.Christ}
}
