HPLC determination of caffeine in tea, chocolate products and carbonated beverages 
Mónica C. Rojo de Camargo and Maria Cecilia F. Toledo 
 - Journal of the Science of Food and Agriculture .
<br/><br/><label>Subjects--Index Terms: </label>Bebidas carbonicas Chocolate Theobroma cacao Te Cafeina Cromatografia Tecnicas analiticas