1. The experimental production of cough in human subjects induced by citric acid aerosols. Preliminary studies on the evaluation of antitussive agents;Bickerman, H.A.; Barach, A.L.;Amer. J. med. Sci,1954
2. Antitussive action of L-propoxyphene in citric acid-induced cough response;Calesnick, B.; Christensen, J.A.; Munch, J.C.;Ibid,1961
3. Evaluation agent;Cass, L.J.; tussive; Frederik, W.S.;New Engl. J. Med,1953
4. Effect of antitussive agents on experimental and pathological cough in man;S., Gravenstein J.; Devloo, R.A.; Beecher, H.K.;J. appl. Physiol,1954
5. A measure of the effectiveness of propoxyphene antitussives in children;Gruber, C. M. Jr.; Carter, C. H;Amer. J. med. Sci,1961