Пaтeнтный дeпapтaмeнт Эcтoнии . EKI terminibaas Esterm. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//esterm/%D0%9Fa%D1%82e%D0%BD%D1%82%D0%BD%D1%8B%D0%B9%20%D0%B4e%D0%BFap%D1%82a%D0%BCe%D0%BD%D1%82%20%D0%ADc%D1%82o%D0%BD%D0%B8%D0%B8/1/rus (21.06.2026)