Chromatin and morphometry alterations of bovine sperm head after Percoll™ density gradient centrifugation - Oliveira, Letícia Zoccolaro; Santos, Ricarda Maria dos; Lima, Vera Fernanda Martins Hossepian de; Arruda, Rubens Paes de; Andrade, André Furugen Cesar; Guimarães Junior, Vasco; Beletti, Marcelo Emílio (Livestock Science, 2011)