Dam, H. (1935). "The Antihæmorrhagic Vitamin of the Chick.: Occurrence And Chemical Nature". Nature135 (3417): 652–653. doi:10.1038/135652b0. Bibcode: 1935Natur.135..652D.
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Dam, H. (1935). "The Antihæmorrhagic Vitamin of the Chick.: Occurrence And Chemical Nature". Nature135 (3417): 652–653. doi:10.1038/135652b0. Bibcode: 1935Natur.135..652D.