@inproceedings{inproceedings30c1944f, title = {Determination of caffeine , theophylline and theobromine in urine samples of athletes by tlc and glc-np detector techniques}, author = {Pedroso, Rosemary Custodio and Moraes, Ester de Camargo Fonseca}, year = {1988}, publisher = {State University of Ghent/Faculty of Pharmaceutical Sciences}, booktitle = {International Symposium on the Analysis of Anabolizing and Doping Agents in Biosamples} }