SYNTHESIS AND SPECTROSCOPIC CHARACTERIZATION OF SOME NEW HYDROGENOXALATO ORGANOTIN (IV) COMPLEXES. Journal of Engineering Studies and Research, [S. l.], v. 26, n. 2, p. 15–19, 2020. DOI: 10.29081/jesr.v26i2.172. Disponível em: https://jesr.ub.ro/journal/article/view/172. Acesso em: 13 sep. 2025.