Theoretical Investigation of Spectroscopic and Thermodynamic Properties of 1-Acetyl-3-Methyl-4-[3-(3-methoxybenzoxy)benzylidenamino]-4,5- Dihydro-1H-1,2,4-Triazol-5-One by 6-311G(d) and 3-21G HF DFT(B3LYP) Methods. EPSTEM 2018, 2, 49-71.