Ramesh, P., & Bhaskar, K. (2016). Polyethylene Glycol (PEG-400) as an Efficient and Recyclable Reaction Medium for Four-Component Coupling One-Pot Synthesis of Functionalized Pyrroles under Catalyst-free Conditions. Asian Journal of Organic & Medicinal Chemistry, 1(2), 61–65. https://doi.org/10.14233/ajomc.2016.AJOMC-P18