Koester; Larbig Angewandte Chemie, 1961 , vol. 73, p. 620 Full Text Show Details Koester, R.; Larbig, W. Liebigs Annalen der Chemie, 1965 , vol. 682, p. 21 - 48 Full Text Show Details Gmelin Handbook: B: B-Verb.14, 4.4.2.3, page 188 - 189