Nitta, Makoto; Ohnuma, Manami; Iino, Yukio
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1991 , # 5 p. 1115 - 1118

Prostakov, N.S.; Varlamov, A.V.; Borisova, T.N.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1984 , vol. 20, # 5 p. 519 - 521
Khimiya Geterotsiklicheskikh Soedinenii, 1984 , vol. 20, # 5 p. 648 - 650

Nitta, Makoto; Ohnuma, Manami; Iino, Yukio
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1991 , # 5 p. 1115 - 1118

Pavel', G. V.; Tilichenko, M. N.; Smelik, L. B.; Rogacheva, G. A.
Journal of Organic Chemistry USSR (English Translation), 1985 , vol. 21, p. 802 - 805
Zhurnal Organicheskoi Khimii, 1985 , vol. 21, # 4 p. 882 - 886

Pavel', G. V.; Tilichenko, M. N.; Smelik, L. B.; Rogacheva, G. A.
Journal of Organic Chemistry USSR (English Translation), 1985 , vol. 21, p. 802 - 805
Zhurnal Organicheskoi Khimii, 1985 , vol. 21, # 4 p. 882 - 886