Petruso; Bonanno; Caronna; Ciofalo; Maggio; Schillaci
Journal of Heterocyclic Chemistry, 1994 , vol. 31, # 4 p. 941 - 945

Driver, Michael J.; Greenlees, Alexander R.; MacPherson, David T.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1992 , # 23 p. 3155 - 3158

Raimondi, Maria Valeria; Schillaci, Domenico; Petruso, Salvatore
Journal of Heterocyclic Chemistry, 2007 , vol. 44, # 6 p. 1407 - 1411