@article{articlebbc2fd75,
title   = {Comparison among different extraction methods (PFE, SFE, Sonication, Soxlet) for the isolation of organic compounds from coal},
author = {Assis, Lívia Mari and Pinto, Jair Sebastião Silva and Lanças, Fernando Mauro},
year = {2000},
doi = {10.1002/(sici)1520-667x(2000)12:5%3C292::aid-mcs3%3E3.0.co;2-x},
journal   = {Journal of Microcolumn Separations}
}