(1)
M. Ibrahim, M.; Al-Refai, M.; N. Dawoud, J.; Abu-El-Halawa, R.; H. Massad, M.; Judeh, Z.; F. Ali, B. Crystal Structure and Density Functional Calculation of (E)-4-Hydroxy-3-Methyl-N’- (thiophen-2-Ylmethylene)-1,4-Dihydroquinoxaline-2-Carbohydrazide Radical. ajc 2012, 24, 2926-2930.