@article{articlea45816ab,
title   = {Trace elements and heating value from sewage sludge, Barueri, São Paulo, Brasil},
author = {Morais, Leandro Cardoso de and Dweck, Jo and Valenzuela Díaz, Francisco Rolando and Gonçalves, E. M. and Büchler, Pedro Maurício},
year = {2006},
doi = {10.1080/00207230600579704},
journal   = {International Journal of Environmental Studies}
}