Shackelford, Scott A.; Anderson, Mark B.; Christie, Lance C.; Goetzen, Thomas; Guzman, Mark C.; Hananel, Martha A.; Kornreich, Wayne D.; Li, Haitao; Pathak, Ved P.; Rabinovich, Alex K.; Rajapakse, Ranjan J.; Truesdale, Larry K.; Tsank, Stella M.; Vazir, Haresh N.
Journal of Organic Chemistry, 2003 , vol. 68, # 2 p. 267 - 275

Cherkasov, V. M.; Remennikov, G. Ya.; Kisilenko, A. A.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1982 , p. 526 - 529
Khimiya Geterotsiklicheskikh Soedinenii, 1982 , vol. 18, # 5 p. 691 - 694