For citations:

Smirnov I.P., Vinogradov D.M., Alexeev A.I. To Moscow ot to Saint Petersburg? Population gravity of the Tver Region according to the data of «VKontakte» online network. Proceedings of the Russian Geographical Society. 2019;151(6):69-80. (In Russ.) https://doi.org/10.31857/S0869-6071151669-80