1. Depression. WHO Statistics, Geneva: World Health Org., 2011.
2. Krasnov, V.N., Rasstroistva affektivnogo spektra (Affective Disorders), Moscow: Prakticheskaya Meditsina, 2011.
3. Mosolov, S.N., Resistance to psychopharmacotherapy, Prikhiatr. Psikhofarmakoter., 2002, no. 4, p. 132.
4. Fava, M., Diagnosis and definition of treatment-resistant depression, Biol. Psychiatry, 2003, vol. 53, no. 8, p. 649.
5. Bykov, Yu.V., Bekker, R.A., and Reznikov, M.K., Depressii i rezistentnost’ (Depression and Resistance), Moscow: INFRA-M, 2013.