1. Mechanical aids to long expansion in non-intubated surgical patients;Pontoppidan, H.;Am Rev RespirDis,1980
2. A controlled trial of intermittent positive pressure breathing, incentive spirometry and deep breathing exercise in preventing pulmonary complications after abdominal surgery;Celli, B.R.; Rodriguez, K.; Snider, G.L.;Am Rev Respir Dis,1984
3. Operative risk in patients with severe obstructive pulmonary disease;Kroenke, K.; Lawrence, V.A.; Theroux, J.F.; Tuley, M.R.;Arch Intern Med,1992
4. Preoperative pulmonary evaluation;Jackson, C.;Arch Intern Med,1988
5. Diaphragrnatic function after upper abdominal surgery in humans;Ford, G.T.; Whitelaw, W.; Rosenal, T.W.; Cruse, P.J.; Guenter, C.A.;Am Rev RespirDis,1983