American Psychiatric Association. Diagnostic, Statistical Manual of Mental Disorders, 4th edition (DSM-IV)Washington (DC): American Psychiatric Association, 1994.
2.
BlackDW, BoffeliTJ. Simple schizophrenia: past, present and future. Am J Psychiatry, 146:1267–1273. 1989.
3.
KendlerKS, McGuireM, GruenbergAM, WalshD. An epidemiologic, clinical and family study of simple schizophrenia in County Roscommon, Ireland. Am J Psychiatry, 151:27–34. 1994.
4.
KerwinR. When should clozapine be initiated in schizophrenia? Some arguments for and against earlier use of clozapine. CNS Drugs, 21:267–278. 2007.
5.
LlorcaP-M, LanconC, FarisseJ, ScottoJ-C. Clozapine and negative symptoms. An open study. Progr Neuro-Psychopharmacol Biol Psychiatry, 24:373–384. 2000.
6.
SilverH. Selective serotonin re-uptake inhibitor augmentation in the treatment of negative symptoms of schizophrenia. Expert Opin Pharmacother, 5:2053–2058. 2004.
7.
StoneAA, HopkinsR, MahnkeMW, ShapiroDW, SilverglateHA. Simple schizophrenia: Syndrome or shibboleth. Am J Psychiatry, 125:305–312. 1968.