1. Electrocardiographic observations on 650 Finnish athletes. Annales Medicinae Internae Fenniae;Klemola, E.,1951
2. Cardiovascular adaptations to prolonged physical effort;Beckner, G.L.; Winsor, T.;Circulation,1954
3. Electrocardiographic study of 20 champion swimmers before and after 1 10-yard sprint swimming competition;Hunt, E.A.;Can MedAssocJ,1963
4. Thorburn 10. Electrocardiograms of marathon runners in 1962 Commonwealth Games;Smith, W.G.; Cullen, K.J.;Br HeartJ,1964
5. morphology and meaning of the electrocardiographic anomalies found in Olympic marathon runners and walkers;Venerando, A.; Frequency, Rulli V.;J Sports Med Phys Fitness,1964