O. AHMED, A.-G. SCHIOPU, and M. OPROESCU, “Comparative Analysis of Metallic Oxides and Nanostructured Materials for Air Purification Applications”, The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, vol. 49, no. 3, pp. 24-29, Sep. 2026.