Compare:
Chibilyov, Alexander (2002). „Steppe and Forest-steppe“. In Shahgedanova, Maria (red.). The Physical Geography of Northern Eurasia. Oxford regional environments. 3 (reprint leid.). Oxford: Oxford University Press (published 2003). p. 248. ISBN9780198233848. Nuoroda tikrinta 30 January 2020. „There are many definitions of steppes. For example, Allan (1946) provides fifty-four definitions of this term. Stamp and Clark (1979) define steppes as 'mid-latitude areas dominated by herbaceous vegetation and termed locally steppes, prairies, pampas, high veldts, downland, etc.'“
