^Tung, Truong Thanh; Christensen, Søren Brøgger; Nielsen, John (2017). “Difluoroacetic Acid as a New Reagent for Direct C-H Difluoromethylation of Heteroaromatic Compounds”. Chemistry - A European Journal23 (72): 18125–18128. doi:10.1002/chem.201704261. PMID28945302.