Mohammed, Hamid Hashim. “Synthesis of Fused Cyclic Chromene and Alicyclic Chromene Derivatives from 2-Amino-4-[4-(dimethylamino)phenyl]5-Oxo-4H,5H-Pyrano [3,2-c]chromene-3-Carbonitrile”. Al-Mustansiriyah Journal of Science, vol. 27, no. 5, July 2017, pp. 36-44, https://doi.org/10.23851/mjs.v27i5.165.