1. “Fractional Analysis of the Alveolar Air in Emphysema,”;Marshall;Clin. Sci.,1952
2. “Automatic Fractional Analysis of Expired Air as a Clinical Test,”;Dornhorst;Lancet,1953
3. “Alveolar Carbon Dioxide Levels in Acute Poliomyelitis,”;Crane;J. Appl. Physiol.,1956