1. Amer. Heart J. 33 (1947) 107.
2. Amer. J. Med. 5 (1948) 792.
3. Minerva Chir. 7 (1952) 164.
4. Harry Gold, Quinidine in Disorders of the Heart, S. 40. New York: P. B. Hoeber. 1950.
5. Amer. Heart J. 33 (1947) 102; Ned. Tijdschr. v. Geneesk. 74 (1930) 3126.