Fedoseev R.V., Bogatyrev E.D., и Mariskin O.I. «BASIC MODELS OF THE NOBILITY COMMERCIAL AND INDUSTRIAL ENTREPRENEURSHIP IN THE SECOND HALF OF THE XIX CENTURY (ACCORDING TO THE MIDDLE VOLGA REGION DATA)». «Вестник НАН РК», no. 5 (октябрь 15, 2021): 257–264. просмотрено ноябрь 22, 2024. https://journals.nauka-nanrk.kz/bulletin-science/article/view/2498.