Сапрыка В.А., Травин Р.А. THE INSTITUTION OF TWIN CITIES AS A TOOL FOR DEVELOPMENT OF BORDER AREAS // Среднерусский вестник общественных наук. 2017. Vol. 12, no. 4. P. 91–99. https://doi.org/10.22394/2071-2367-2017-12-4-91-99