Väljako, Kristo2023-05-122023-05-122019-07-01http://hdl.handle.net/10062/89765engopenAccessAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/ringidmonomorfismidpüsivad moodulidMonomorphisms in the Category of firm ModulesPresentation