1. Kaplan & Sadock’s comprehensive textbook of psychiatry;Sadock,2009
2. Dementia Praecox or the Group of Schizophrenias;Bleuler,1911
3. Clinical Psychiatry: A Textbook for Students and Physicians;Kraepelin,1915
4. Dementia Praecox and Paraphrenia;Kraepelin,1919
5. Relationship of ‘prodromal’ symptoms with severity and type of psychopathology in the active phase of schizophrenia;Moukas;Compr Psychiatry,2010