bool . EKI Combined Dictionary 2026. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif/est,other/eki/bool/1/est (26.08.2026)
bool . EKI terminibaas Esterm. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif/est,other,mul/esterm/bool/1/est (26.08.2026)