Varaporn Tapna. 1994. The study of pharmacokinetic and physiological profiles of caffeine in healthy volunteers. Faculty of Graduate Studies, Mahidol University;
Varaporn Tapna. (1994) The study of pharmacokinetic and physiological profiles of caffeine in healthy volunteers . Mahidol University/Bangkok.
Varaporn Tapna. The study of pharmacokinetic and physiological profiles of caffeine in healthy volunteers. . Bangkok:Mahidol University, 1994.
Varaporn Tapna. (1994) The study of pharmacokinetic and physiological profiles of caffeine in healthy volunteers . Mahidol University/Bangkok.