Salem, M. S., El-Hashash, M. A. E.-A. M., Mahmoud, A.-S. O. A., & Madkour, H. M. F. (2014). Facile synthesis of new fused and non-fused heterocyclic systems from a γ-ketoacid. European Journal of Chemistry, 5(1), 33–40. https://doi.org/10.5155/eurjchem.5.1.33-40.900