BANDLER, R. Integration of somatic and autonomic reactions within the midbrain periaqueductal gray ; Viscerotopic somatotopic and functional organization. Role of the Forebrain Sensation and Behavior, Prog. Brain.Res. 1991, 87, 269-305
KANAI, T. Localization of the central vocalization mechanism in the brain stem of the cat. Exp. Neurol. 1962, 6, 462-434