• Compliance of wastewater treatment plants in Järva Country with the EU urban wastewater treatment directive and Estonian national requirementsNiine, Raili; Loigu, Enn; Pachel, KarinEuropean scientific journal2013 / p. 365-375 : ill
• Development of Estonian nutrient discharge standards for wastewater treatment plantsNiine, Raili; Loigu, Enn; Tang, Walter ZhonghongEstonian journal of engineering2013 / p. 152-168 : ill https://doi.org/10.3176/eng.2013.2.05 https://www.scopus.com/record/display.uri?eid=2-s2.0-84878820928&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.3176%2Feng.2013.2.05%29&sessionSearchId=08e7c58f88aea92900d731f06ee215ed
• Distribution of different pollution loads from wastewater treatment plants and their impact on water bodies in EstoniaNiine, Raili; Loigu, Enn; Pachel, KarinInternational journal of energy and environment2013 / p. 86-95 : ill
• Population equivalence based discharge criteria of wastewater treatment plants in Estonia = Inimekvivalentidel põhinevad reoveepuhastite heitvee standardid EestisNiine, Raili2014
• Wastewater impact on the quality of waterbodies in EstoniaNiine, Raili; Loigu, Enn; Pachel, KarinAdvances in Environment, Computational Chemistry & Bioscience : [proceedings of the EED '12, COMPUCHEM '12, BIO '12, ICBB '12, ICAC '12] : Montreux, Switzerland, December 29-31, 20122012 / p. 175-180 : ill