1. Proxyphyllinwirkung bei chronisch-obstruktiven Atemweg-serkrankungen;Geisler;Dtsch Med Wochenschr,1980
2. Controlled-release theophylline and proxyphylline in asthmatics: a comparative study;Mosbech;Pharmatherapeutica,1984
3. Interaction between proxyphylline and salbutamol;Kanto;Int J Clin Pharmacol Ther Toxicol,1981