@article {De Vooys 1903,
	title = {De handschriften van Hendrik van Kalkar{\textquoteright}s werken},
	journal = {Nederlandsch archief voor kerkgeschiedenis},
	volume = {nieuwe serie : 2},
	year = {1903},
	pages = {306-308},
	keywords = {Henricus Egher de Calcaria O.Cart. (opera)},
	attachments = {http://cartusiana.org/sites/default/files/De\%20Vooys_De\%20handschriften\%20van\%20Hendrik\%20van\%20\%20Kalkar\%27s\%20werken.PDF},
	author = {De Vooys, C.G.N.}
}
