1. 1,2- and 1,4-Cycloaddition to Conjugated Dienes
2. The Conservation of Oribital Symmetry;Woodward,1970
3. Organic Reactions and Orbital Symmetry;Gilchrist,1979
4. Chemistry of Ketenes, Allenes and Related Compounds;Patai,1980
5. Cycloaddition Reactions of Heterocumulenes;Ulrich,1967