Nijhuis, T. Alexander; Makkee, Michiel; Moulijn, Jacob A.; Weckhuysen, Bert M. "The Production of Propene Oxide: Catalytic Processes and Recent Developments" Industrial & Engineering Chemistry Research 2006, volume 45, 3447-3459. doi:10.1021/ie0513090
Andrew E. Taggi, Harald Wack, Ahmed M. Hafez, Stefan France, and Thomas Lectka (2002); "Generation of Ketenes from Acid Chlorides Using NaH/Crown Ether Shuttle-Deprotonation for Use in Asymmetric Catalysis". Org. Lett. 4, 4, 627–629; doi:10.1021/ol0172525
