1. AMBACHE, N., KILLICK, S.W. & ZAR, M.A. (1975). Extraction from ox retractor penis of an inhibitory substance which mimics its atropine-resistant neurogenic relaxation. Br. J. Pharmac., 54, 409–410.
2. BOULLIN, D.J. (1980). Cerebral vasospasm, pp. 120–124. Chichester: John Wiley & Sons.
3. BOWMAN, ANNE & DRUMMOND, A.H. (1984). Cyclic GMP mediates neurogenic relaxation in the bovine retractor penis muscle. Br. J. Pharmac., 81, 665–674.
4. BOWMAN, ANNE & GILLESPIE, J.S. (1981a). An erythrocyte-associated antagonist of inhibitory mechanisms in the bovine retractor penis muscle. Br. J. Pharmac., 74, 181–182P.
5. BOWMAN, ANNE & GILLESPIE, J.S. (1981b). Differential blockade of non-adrenergic inhibitory mechanisms in bovine retractor penis and guinea pig taenia caeci. J. Physiol., 317, 92–93P.