1. E.D. Desi, “The Oxides of Tungsten,”J. Am. Chem. Soc., 19, 213–242 (1897). (Equi Diagram; Experimental)
2. M. Delépine and L.A. Hallopeau, “On the Heat of Oxidation of Tungsten,”C.R. Acad. Sci. (Paris), 129, 600–603 (1899) in French. (Thermo; Experimental)
3. M. Delépine, “On the Reduction of Tungstic Anhydride by Zinc: Preparation of Pure Tungsten,”C.R. Acad. Sci. (Paris),,131, 184–187 (1900) in French. (Thermo; Experimental)
4. E.T. Allen and V.H. Gottschalk, “Researches on the Oxides of Tungsten,”Am. Chem. J., 27, 328–340 (1902). (Equi Diagram; Experimental)
5. W.G. Mixter, “The Heat of Combination of Acidic Oxides with Sodium Oxide and the Heat of Oxidation of Chromium,”Am. J. Sci., 26, 125–127 (1908); quoted by [48Huf] and [57Vas]. (Thermo; Experimental)