v.Pechmann Chemische Berichte, 1888 , vol. 21, p. 1421 Chemische Berichte, 1889 , vol. 22, p. 2214 Full Text Show Details Nef Justus Liebigs Annalen der Chemie, 1887 , vol. 237, p. 26 American Chemical Journal, 1889 , vol. 11, p. 7