Determination of the chemical composition of the residual powder in order to identify the source of releaseSonia Niculina Şuvar, Maria Prodan, Andrei Szollosi-Moţa, Irina Nălboc and Aurelian NicolaMATEC Web Conf., 342 (2021) 03004DOI: https://doi.org/10.1051/matecconf/202134203004