@article{article,
title = {Supercritical fluid extraction of polycyclic aromatic hydrocarbons (PAH) from native soil and fly ash with pure and modified carbon dioxide and dimethylether},
author = {},
year = {1997},
journal = {Fresenius' Journal of Analytical Chemistry},
volume = {357},
number = {8},
pages = {1128-1132},
howpublished = "\url{https://eurekamag.com/research/003/289/003289186.php}"
}