A New, Highly Stereoselective Synthesis of β-Unsubstituted (Z)-γ-Alkylidenebutenolides Using Bromine as a Removable Stereocontrol Element - Boukouvalas, John; Beltrán, Paola P; Lachance, Nicolas; Côté, Sébastien; Maltais, François; Pouliot, Martin (Synlett, 2007)