1. Bion WR (1961) Experiences in groups and other papers. Tavistock, London
2. Dejours C (1980) Travail: usure mentale. Le Centurion, Paris
3. Dicks HV (1939) Clinical studies in psychopathology. Arnold, London
4. Guntrip H (1961) Personality structure and human interaction. Hogarth, Institute of Psycho- Analysis, London
5. Guntrip H (1968) Schizoid phenomena, object relations and the self. Hogarth, Institute of Psycho-Analysis, London