Uzoukwu, B.A. et al.: Crystal structure of N,N'-ethylenbis(4-propanoyl-2,4-dihydro-5-methyl- 2-phenyl-3H-pyrazol-3-oneimine), C28H32N6O2. In: Zeitschrift für Kristallographie - New Crystal Structures 216 (2001), S. 151-152. DOI:
https://doi.org/10.1524/ncrs.2001.216.14.151