1. Esquirol, Ann. Hyg., Paris, 1830, Vol. 5, p. 332.
2. Riul', I. F., Opyt statisticheskogo obozreniia o chisle oderzhimykh raznogo roda dushevnymi nedugami v Rossii, St. Petersburg, 1840.
3. Iakobii, P. I., Osnovy administrativnoi psikhiatrii, Moscow, 1900.
4. Iakovenko, V. I., Dushevno bol'nye Moskovskoi gubernii, Moscow, 1900.
5. Ignat'ev, M. V., Issledovanie o dushevno bol'nykh po otchetam russkikh psikhiatricheskikh zavedenii, St. Petersburg, 1902.