Кожанчиков, Олег Игоревич, and Наталья Юрьевна Кожанчикова. “PROSPECTS OF DEVELOPMENT OF THE PATENT SYSTEM OF TAXATION FOR INDIVIDUAL ENTREPRENEURS IN THE OREL REGION”. Среднерусский вестник общественных наук, vol. 11, no. 2, Feb. 2016, pp. 146-51, https://doi.org/10.12737/19394.