1. A.G. Dowson,Dissertation abstract, Cambridge University, Cambridge, UK (1936–1937); quoted in [Hansen]. (Equi Diagram; Experimental)
2. R.P. Elliott,Tech. Rep. I, OSR Tech. Note OSR-TN-247 Armour Research Foundation, Chicago, IL, (1954); quoted in [Hansen]. (Equi Diagram; Experimental)
3. C.S. Smith, “Alloys of Copper, Nickel, and Tantalum,”Trans. AIME, 215, 905–909 (1959). (Equi Diagram, Thermo; Experimental)
4. R. Kieffer, St. Windisch, and H. Nowotny, “Niobium-Tantalum Infiltrated Alloys,”Metall, 17, 669–677 (1963) in German. (Equi Diagram; Experimental)
5. M.H. Read and C. Altman, “A New Structure in Tantalum Thin Films,”Appl. Phys. Lett, 7, 51–52 (1965). (Meta Phases; Experimental)