Carretero, J. C., & Ghosez, L. (1987). A New Synthesis of Alpha,Beta-unsaturated Sulfonates and Their Stereoselective Conversion Into Trans-alpha,Beta-epoxysulphonates. Tetrahedron Letters, 28(10), 1101-1104. https://doi.org/10.1016/S0040-4039(00)95921-5 (Original work published 1987)