Carretero, J. C., & Ghosez, L. (1988). A Practical Route Towards Alpha,Beta-unsaturated Delta-lactones Based On a [3+3] Strategy - Synthesis of (-)-argentilactone. Tetrahedron Letters, 29(17), 2059-2062. https://doi.org/10.1016/S0040-4039(00)87834-X (Original work published 1988)