• Methodology for the improvement of large district heating networksVolkova, Anna; Mashatin, Vladislav; Hlebnikov, Aleksandr; Siirde, AndresScientific journal of Riga Technical University. Environmental and climate technologies2012 / p. 39-45 : ill https://dom.lndb.lv/data/obj/file/30070253.pdf
• Methodology for the improvement of large district heating networksVolkova, Anna; Mašatin, Vladislav; Hlebnikov, Aleksandr; Siirde, AndresScientific journal of Riga Technical University. Environmental and climate technologies2013 / p. 39-45 https://dom.lndb.lv/data/obj/file/30070253.pdf
• Sustainable development in Estonian miningŠommet, JulijaScientific journal of Riga Technical University. Environmental and climate technologies2013 / p. 34-40 : ill https://doi.org/10.2478/rtuect-2013-0005 https://www.scopus.com/sourceid/21100232822 https://www.scopus.com/record/display.uri?eid=2-s2.0-84885782560&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.2478%2Frtuect-2013-0005%29
• Technologies for decreasing mining lossesValgma, Ingo; Väizene, Vivika; Kolats, Margit; Saarnak, MartinScientific journal of Riga Technical University. Environmental and climate technologies2013 / p. 41-47 : ill https://doi.org/10.2478/rtuect-2013-0006 https://www.scopus.com/sourceid/21100232822 https://www.scopus.com/record/display.uri?eid=2-s2.0-84885824782&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.2478%2Frtuect-2013-0006%29