« Reducing the Sludge Quantity Produced from Used Water Purification – A Source of Profit ». The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, vol. 39, nᵒ 4, décembre 2016, p. 61-63, https://ojs.ugal.ro/index.php/mms/article/view/1228.