1. Carlsson, A., Science, 127, 471 (1958).
2. Carlsson, A., Pharmacol. Revs., 11, 490 (1959).
3. de Jong, H., and Baruk, H., La catatonie Experimentale (Masson, Paris, 1930).
4. Schaltenbrand, G., Pflügers Archiv., 209, 623 (1925).
5. von Schroeder, W., Arch. Exp. Path. u. Pharm., 17, 125 (1883).