Acute systemic administration of caffeine modulates defensive tonic imobility, locomotion and nociceptive responses in Guinea pigs - Zugaib, J.; Ferreira, M. D.; Bretengani, Mariulza Rocha; Pinto, R. B.; Spudeit, W. A.; Menescal-de-Oliveira, Leda (Reunião Anual da Federação de Sociedades de Biologia Experimental (FeSBE), 2011)