Kettunen, KimmoNivre, JoakimKaalep, Heiki-JaanMuischnek, KadriKoit, Mare2023-09-222023-09-222007ISSN 1736-6305 (Online)https://hdl.handle.net/10062/92713engopenAccessAttribution-NonCommercial-NoDerivs 3.0 Estoniahttp://creativecommons.org/licenses/by-nc-nd/3.0/ee/Managing Keyword Variation with Frequency Based Generation of Word Forms in IRArticle