McFarland, J. W.; Howe, B. M.; Lehmkuhler, J. D.; Myers, D. C.
Journal of Heterocyclic Chemistry, 1995 , vol. 32, # 6 p. 1747 - 1750

Joshi, Makarand V.; Hemler, Christine; Cava, Michael P.; Cain, Jason L.; Bakker, Martin G.; et al.
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1993 , # 6 p. 1081 - 1086

McFarland, J. W.; Howe, B. M.; Lehmkuhler, J. D.; Myers, D. C.
Journal of Heterocyclic Chemistry, 1995 , vol. 32, # 6 p. 1747 - 1750