1. Wigan, A.L., The Duality of the Mind, 1844.
2. Jackson, G.H., Izbrannye raboty po afazii (Selected Works on Aphasia), St. Petersburg: Niva, 1996.
3. Wilks, S., On the Faculty of Language and the Duality of Mind, Guy’s Hospital Rep., 1872, vol. 17.
4. Manaseina, M.M., O pis’me voobshche, o zerkal’nom pis’me v chastnosti. O roli polusharii bol’shogo mozga. Patologo-fiziologicheskoe issledovanie (On Writing in General, on Mirror Writing in Particular; on the Role of the Brain Hemispheres: Pathophysiological Investigation), St. Petersburg: Yakov Trei, 1983, no. 51.
5. Astvatsaturov, M.I., On the Origin of Right-Handedness and Functional Brain Asymmetry, Nauchnaya Meditsina, Petrograd, 1923, no. 11, p. 76.