Bassoli, Angela; Borgonovo, Gigliola; Busnelli, Gilberto; Morini, Gabriella
European Journal of Organic Chemistry, 2006 , # 7 p. 1656 - 1663

Dunn, A. D.; Kinnear, K. I.; Norrie, R.; Ringan, N.; Martin, D.
Journal of Heterocyclic Chemistry, 1987 , vol. 24, p. 175 - 180