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2. 2010/31/EU Directive 2010/31/EU of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings. [žiūrėta 2018-05-12]. Prieiga internetu: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex%3A32010L0031
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