1. Comparison of the maximal endurance of normal children and patients with congenital cardiac disease;Goldberg;J. Pediat.,1966
2. Attitudinal factors in congenital heart disease;Linde;Pediatrics,1966
3. Determination of physical working capacity: Physiological and clinical study with special reference to standardization of cardiopulmonary, functional tests;Wahlund;Acta med. scandinav.,1948
4. Use of the working capacity test in the evaluation of children with congenital heart disease;Duffie;Pediatrics,1963
5. The maximal exercise in children;Kramer;Am. J. Dis. Child.,1964