Demir, Ayhan S.; Gross, Raymond S.; Dunlap, Norma K.; Bashir-Hashemi, A.; Watt, David S.
Tetrahedron Letters, 1986 , vol. 27, # 46 p. 5567 - 5570

Bojilova, Anka; Ivanov, Christo
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1987 , vol. 26, # 1-12 p. 731 - 735