Uppin, JuhanReinvelt, EinikeKonnula, Herbert2026-03-242026-03-242019https://hdl.handle.net/10062/119844etAttribution-NonCommercial-NoDerivs 3.0 Estoniahttps://creativecommons.org/licenses/by-nc-nd/3.0/ee/praktiline tööThesis