@misc{miscdc9e4ca5,
title   = {Theophylline ranitidine interaction in elderly copd patients},
author = {Vargas, Francisco Suso and Costa, A and Costa, J N and Santos, Silvia Regina Cavani Jorge and Carvalho, Carlos Roberto Ribeiro de},
year = {1991},
booktitle   = {International Conference of the American Lung Association and American Thoracic Society}
}