A. LEOPA, A. SERBAN, M. C. BURTEA, and P. GOJAN, “Study on the Sludge Capitalization as a Fertilizer for Ornamental Garden Plants”, The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, vol. 42, no. 3, pp. 16-20, Sep. 2019.