1. Mackie, T. T. Vitamin K deficiency in the absence of jaundice.New York J. Med. 40:987, 1940.
2. Bendandi, A., andLasagna, G. C. Comportamento dell' attività protrombinica e antitrombinica del plasma in corso di rettocolite ulcerosa.Boll. Soc. Ital. Biol. Sper. 35:411, 1959.
3. Page, R. C., andBercovitz, Z. Prothrombin and fibrinogen studies in chronic ulcerative colitis.Amer. J. Dig. Dis. 9:419, 1942.
4. Sussman, L. N., Cohen, I. B., andGittler, R. Clinical application of simplified serum prothrombin consumption test.J.A.M.A. 156:702, 1954.
5. Quick, A. J. Hemorrhagic Diseases. Lea, Philadelphia, 1957.