Kalam Khan, Firoz A., et al. “Pr3+ Doped CoFe2O4: A Highly Efficient, Magnetically Recoverable and Reusable Catalyst for One-Pot Four-Component Synthesis of Multisubstituted Pyrroles”. Iranian Journal of Catalysis, vol. 6, no. 4, Feb. 2024, https://oiccpress.com/ijc/article/view/3932.