PROKHOROV, ANDREI V. “THE ECONOMIC ASPECT OF THE PROCESS OF FORMING THE UNITY OF POWER AND PROPERTYUNDER FEUDALISM”. Gosudarstvennaya Sluzhba, vol. 21, no. 3, May 2019, pp. 113-8, https://doi.org/10.22394/2070-8378-2019-21-3-113-118.