Czeh, Bronislaw; Son, Byungki; Bartsch, Richard A.
Tetrahedron Letters, 1983 , vol. 24, # 29 p. 2923 - 2926

Czech, Bronislaw P.; Czech, Anna; Son, Byungki; Lee, Han Koo; Bartsch, Richard A.
Journal of Heterocyclic Chemistry, 1986 , vol. 23, p. 465 - 471