Action of trivalent chromium on rat liver structure: histometric and haematological studies - Silva, Rogério Ferreira da; Lopes, Ruberval Armando; Sala, Miguel Angel; Vinha, Dionísio; Regalo, Simone Cecílio Hallak; Souza, Ana Maria de; Gregório, Zita Maria de O. (International Journal of Morphology, 2006)