Effects of two ventilation systems and bedding change frequency on cage environmental factors in rats (Rattus norvegicus) - Carissimi, Alexandre da Silva; Chaguri, L C A A; Teixeira, M. A.; Mori, Claudia Madalena Cabrera; Macchione, Mariangela; Sant'anna, E T G; Saldiva, Paulo Hilário Nascimento; Souza, Nívea Lopes de; Merusse, José Luiz Bernardino (Animal Technology, 2000)