Rezaeivala, Majid, and Sam Daftari. “Ab Initio Calculations of 13C NMR Chemical Shielding in Some N4O2, N4S2 and N6 Schiff Base Ligands Containing Piperazine Moiety”. European Journal of Chemistry 5, no. 2 (June 30, 2014): 343–350. Accessed December 4, 2024. https://eurjchem.com/index.php/eurjchem/article/view/959.