1. 1. Bahnson CB. [In the field of aggression - the tumor - the patient - the therapist]. In: Austrian Society for Psycho-oncology, editors. Yearbook of Psycho-oncology. Vienna: Springer 1997;181-97. Austrian.
2. 2. Schwarz R, Singer S. [Introduction Psychosocial Oncology]. Munich, Basel: Ernst Reinhardt Verlag, 2008. German.
3. 3. Petkova M, Nikolov V. [Anger, depression and pain among patients with oncological diseases]. Bulgarian Journal of Psychology. 2011;3-4:597-603. Bulgarian.
4. 4. Tschuschke V. [Psychological aspects of the development and management of cancer]. Psychooncology. Edition. Stuttgart: Schattauer; 2011. German
5. 5. Zebrack B. Quality of life of long-term survivors of leukemia and lymphoma. J Psychos Oncol. 2000;18(4),39-59.