I. HOPULELE, C. NEJNERU, M. C. PERJU, et M. AXINTE, Thin Layers Obtained by Electric Spark in Liquid Medium, The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, vol. 33, nᵒ 4, p. 73-77, déc. 2010.