Friedel, C.; Ladenburg, A. Ann. Chim. Phys., 1871 , vol. 23, p. 430 - 442 Full Text Show Details Friedel, C.; Ladenburg, A. Liebigs Annalen der Chemie, 1867 , vol. 143, p. 118 - 128 Full Text Show Details Gmelin Handbook: Si: MVol.B, 258, page 701 - 703