Classifi ed according to World Bank estimates of 2012 GNI per capita The world by income Low ($1,035 or less) Lower middle ($1,036-$4,085) Upper middle ($4,086-$12,615) High ($12,616 or more) No
Stored only when both papers are in the corpus — 405 citations exist upstream.
Imported from OpenAlex (CC0) — nothing here is generated.