aйва продолгова́тая . Aianduse terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//ait/a%D0%B9%D0%B2%D0%B0%20%D0%BF%D1%80%D0%BE%D0%B4%D0%BE%D0%BB%D0%B3%D0%BE%D0%B2%D0%B0%CC%81%D1%82%D0%B0%D1%8F/1/rus (21.06.2026)