@book {4797,
	title = {Sakramententheologie bei den Nestorianern},
	series = {Orientalia christiana analecta},
	number = {133},
	year = {1947},
	publisher = {Pontifical Institute of Oriental Studies},
	organization = {Pontifical Institute of Oriental Studies},
	address = {Rome},
	keywords = {Liturgy},
	author = {Wilhelm de Vries}
}
@book {4796,
	title = {Sakramententheologie bei den syrischen Monophysiten},
	series = {Orientalia christiana analecta},
	number = {125},
	year = {1940},
	publisher = {Pontifical Institute of Oriental Studies},
	organization = {Pontifical Institute of Oriental Studies},
	address = {Rome},
	keywords = {Liturgy},
	author = {Wilhelm de Vries}
}
@inbook {4141,
	title = {Die syrisch-nestorianische Haltung zu Chalkedon},
	booktitle = {Das Konzil von Chalkedon: Geschichte und Gegenwart},
	volume = {1},
	year = {1951},
	pages = {603{\textendash}635},
	publisher = {Echter-Verlag},
	organization = {Echter-Verlag},
	address = {W{\"u}rzburg},
	keywords = {Chalcedon},
	author = {Wilhelm de Vries},
	editor = {Alois Grillmeier and Heinrich Bacht}
}
