Csuk, R., Fürstner, A., Sterk, H., & Weidmann, H. (1986). SYNTHESIS OF CARBOHYDRATE DERIVED α-METHYLENE-γ-LACTONES BY DIASTEREOSELECTIVE, LOW TEMPERATURE REFORMATSKY-TYPE REACTIONS. Journal of Carbohydate Chemistry, 5(3), 4459-467. doi:10.1080/07328308608058849.