научно-исследовательские и опытно-конструкторские разработки . Koolisõnastikud 2005–2010. Eesti Keele Instituut, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kool_KV/%D0%BD%D0%B0%D1%83%D1%87%D0%BD%D0%BE-%D0%B8%D1%81%D1%81%D0%BB%D0%B5%D0%B4%D0%BE%D0%B2%D0%B0%D1%82%D0%B5%D0%BB%D1%8C%D1%81%D0%BA%D0%B8%D0%B5%20%D0%B8%20%D0%BE%D0%BF%D1%8B%D1%82%D0%BD%D0%BE-%D0%BA%D0%BE%D0%BD%D1%81%D1%82%D1%80%D1%83%D0%BA%D1%82%D0%BE%D1%80%D1%81%D0%BA%D0%B8%D0%B5%20%D1%80%D0%B0%D0%B7%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D0%BA%D0%B8/1/rus (21.06.2026)
