For citations:
Karachurina L.B. POPULATION DYNAMICS OF CENTERS AND SECOND CITIES OF RUSSIA’S REGIONS: ARE THERE TENDENCIES TO POLYCENTRISM? Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2018;(4):7-21. (In Russ.) https://doi.org/10.1134/S2587556618040076