1. H. Fischer , in The Chemistry of Alkenes, ed. S. Patai, Wiley-Interscience, New York, 1964, p. 1025
2. H. Hopf , in The Chemistry of Ketenes, Allenes and Related Compounds, ed. S. Patai, Wiley-Interscience, New York, 1980, p. 779
3. L. Brandsma , Synthesis of Acetylenes, Allenes and Cumulenes, Elsevier, Oxford, 2004
4. Photoisomerization of Δ-Cholesten-3-One
5. Chemistry of Cyclobutanes. III. Synthesis of Unsaturated Four-membered Ring Hydrocarbons