@article{article33d7060d, title = {Liquid-liquid extraction of pharmaceuticals by aqueous two-phase systems}, author = {Xu, Yan and Souza, Maria Aparecida de and Ribeiro-Pontes, Marcella Zanella and Vitolo, Michele and Pessoa Junior, Adalberto}, year = {2001}, journal = {Revista Brasileira de CiĂȘncias FarmacĂȘuticas} }