1. The normal duration of the electrocardiographic ventricular complex;Adams;J. Clin. Invest.,1936
2. Normal duration of Q-T interval;Ashman;Proc. Soc. Exper. Biol. & Med.,1939
3. Essentials of Electrocardiography;Ashman,1941
4. Indutroduction to Statistics in the Medical Sciences;Batson,1956
5. An analysis of the time relations of electrocardiography;Bazzett;Heart,1920