Ross, C F, Blob, R W, Carrier, D R, Daley, M A, Deban, S M, Demes, B, Gripper, J L, Iriarte-Diaz, J, Kilbourne, B M, Landberg, T, Polk, J D, Schilling, N, Vanhooydonck, B, "The evolution of locomotor rhythmicity in tetrapods", Evolution,