1. The scale for the assessment of negative symptoms (SANS);Andreasen,1983
2. The scale for the assessment of positive symptoms (SAPS);Andreasen,1984
3. Negative v positive schizophrenia: definition and validation;Andreasen;Arch Gen Psychiatry,1982
4. Quantitative EEG in “positive” and “negative” schizophrenia;Begić;Acta Psychiatr Scand,2000
5. EEG characteristics in depression, “negative” and “positive” and schizophrenia;Begić;Psychiatr Danub,2009