@misc{miscf24018a2,
title   = {Thin layer chromatographic determination of cafeine and acetylsalicylic acid in analgesic tablets - standard addition method},
author = {Bonato, Pierina Sueli and Borin, M F and Del Lama, Maria Perpetua Freire de Morais},
year = {1990},
booktitle   = {Jornada Farmaceutica de Ribeirao Preto}
}