Galkin, Alexander G., Igor A. Isaev, Vladimir G. Krikun, Ol’ga G. Larina, and Vitaly V. Penskoy. 2018. “The Problems of Single Legal Field Development in Russia of the Early Modern Times (the End of the XV - the Beginning of the XVII Century)”. Amazonia Investiga 7 (12):153-59. https://amazoniainvestiga.info/index.php/amazonia/article/view/575.