AU - BOVERMAN M TI - RIgidity, chronicity, schizophrenia PT - JOUR DP - 1959 TA - A.M.A. Archives of General Psychiatry pages = {235-242}, VI - 1 IP - 3 AID - 10.1001/archpsyc.1959.03590030019001 [doi] 4100 - http://dx.doi.org/10.1001/archpsyc.1959.03590030019001 SO - A.M.A. Archives of General Psychiatry September 1, 1959 1(3):235