Bernardi88a

F. Bernardi, A. Bottoni, M. Olivucci, M. A. Robb, H. B. Schlegel, and G. Tonachini, “Do Supra-Antara Paths Really Exist for 2+2 Cycloaddition Reactions? Analytical Computation of the MC-SCF Hessians for Transition States of C₂H₄ with C₂H₄, Singlet O₂, and Ketene,” J. Am. Chem. Soc., 110 (1988) 5993-95. DOI: 10.1021/ja00226a011