For citations:

Smirnova M.A., Lozbenev N.I. Diagnostic criteria and classification of hydromorphic soils in forest-steppe zone of the Oka-Don Lowland. Dokuchaev Soil Bulletin. 2025;(122):256-288. (In Russ.) https://doi.org/10.19047/0136-1694-2025-122-256-288