A Photochemical 1,3 Cycloaddition of Olefins to Benzene K. E. Wilzbach and Louis Kaplan J. Am. Chem. Soc.; 1966; 88(9) pp 2066 – 2067; doi:10.1021/ja00961a052
Photoaddition of benzene to olefins. II. Stereospecific 1,2 and 1,4 cycloadditions Kenneth E. Wilzbach and Louis Kaplan J. Am. Chem. Soc.; 1971; 93(8) pp 2073 – 2074; doi:10.1021/ja00737a052
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1-cyanobicyclo[4.2.0]octa-2,4-dienes and their synthesis United States Patent 2,805,242 Issue Date: September 3, 1957Link