For citations:

Petrishchev V.P., Shcherbakova E.А. On the formation of the framework model of the Specially Protected Natural Areas system in the regions within the Ural-Siberian sector of the steppe and forest-steppe zones. South of Russia: ecology, development. 2021;16(2):65-74. (In Russ.) https://doi.org/10.18470/1992-1098-2021-2-65-74