“Synthesis Of Pharmacologically Active Hexahydroacridine-1,8 (2H, 5H)-Diones Using Nickel (II) Flouride Tetrahydrate As a New Heterogeneous Catalyst”. Communication In Physical Sciences 5, no. 2 (April 20, 2020): 83–98. Accessed June 30, 2026. https://journalcps.com/index.php/volumes/article/view/348.