Emiliano, H. V.; Guaringue, R. P.; Rozada, T. de C.; Fiorin, B. C. Theoretical Study on the Conformational Equilibrium of 1’, 2’ and 3’-Nitro-4-Hydroxy-3-Methoxy Chalcone Isomers. Orbital: Electron. J. Chem. 2021, 13, 182-187.