@article{articleccba05b6,
title   = {Microextration in packed sorbent for determination of sulfonamides in egg samples by liquid chromatography and spectrophotometric detection},
author = {Salami, Fernanda Helena and Queiroz, Maria Eugênia Costa},
year = {2011},
doi = {10.1590/S0103-50532011000900006},
journal   = {Journal of Brazilian Chemical Society}
}