Dridi, K. M., Said, R. B., Arfaoui, Y., & Al-Ayed, A. S. (2013). Activated bentonite promoted Friedländer condensation reactions: Synthesis of thieno[2,3-b]quinolinones and tacrines analogues derivatives. European Journal of Chemistry, 4(3), 216–219. https://doi.org/10.5155/eurjchem.4.3.216-219.788