1. Ryazantsev, S.V., Arkhangelskii, V.N., Vorobieva, O.D.: Demographic development of Russia: trends, forecasts, measures. National Demographic Report. In: Ryazantsev, S.V. (ed.) United Edition LLC, Moscow, 156 p. (2020)
2. Bezrukov, L.A.: Transformation of economic structures and population of Siberia at the post-Soviet stage. Geogr. Orir. Resurs. 4, 25–36 (2020)
3. Ciommi, M., Egidi, G., Salvia, R., Cividino, S., Rontos, K., Salvati, L.: Population dynamics and agglomeration factors: a non-linear threshold estimation of density effects. Sustainability 12, 1–19 (2020)
4. Combes, P.P., Duranton, G., Gobillon, L.: The identification of agglomeration economies. J. Econ. Geogr. 11, 253–266 (2011)
5. Haase, A., Bernt, M., Großmann, K., Mykhnenko, V., Rink, D.: Varieties of shrinkage in European cities. Eur. Urban Reg. Stud. 2, 86–102 (2016)