8. Intramolecular cycloaddition of azoalkenes derived from terminal alkenoic and alkynoic acids Thomas L. Gilchrist,Robert C. Wasson,Frank D. King,Gordon Wootton J. Chem. Soc. Perkin Trans. 1 1987 2511
10. Formation of pyridazino[6,1-c][1,4]oxazin-8(7H)-ones by intramolecular cycloaddition of azoalkenes Thomas L. Gilchrist,Robert C. Wasson,Frank D. King,Gordon Wootton J. Chem. Soc. Perkin Trans. 1 1987 2517