MELŠA, Petr and
Ctibor MAZAL. pi-Facial selectivity in 1,3-dipolar cycloaddition reactions of alpha-methylidene-gamma-lactone substituted by 4-methyl-2,6,7-trioxabicyclo[2.2.2]octanyl group in gamma-position.
Collection of Czechoslovak Chemical Communications. Prague: Inst. Org. Chem. Biochem. Acad. Sci. CR, 2002, vol. 67, No 3, p. 353-364. ISSN 0010-0765.