Safaei-Ghomi, J. et al. 2024. ZrP2O7 NPs: A recyclable, efficient heterogeneous catalyst for the synthesis of 1,6-diamino-2-oxo-4-phenyl-1,2-dihydropyridine-3,5-dicarbonitrile derivatives via a multi-component reaction. Iranian Journal of Catalysis. 4, 4 (Feb. 2024).