1. Indicates key paper. 39Gru: G. Grube, O. Kubaschewski, and K. Zwiauer, “On the Extraction of Nb−Ni Alloys by the Reduction of Niobium Pentoxide by Nickel,”Z. Elektrochem., 45 (12), 881–884 (1939). (Equi Diagram; Experimental)
2. Indicates key paper. 41Pog: S.A. Pogodin and A.N. Selikmann, “On the Phase Diagram of the System Nickel-Niobium,”C.R. (Dokl.) Acad. Sci. URSS, 31 (9), 895–897 (1941). (Equi Diagram; Experimental; Indicates presence of a phase diagram)
3. 41Wal: H.J. Wallbaum, “The Systems of Iron Metals with Titanium, Zirconium, Niobium and Tantalum,”Arch. Eisenhüttenwes., 14 (10), 521–526 (1941). (Crys Structure; Experimental)
4. 43Wal: H.J. Wallbaum, “An Account on the Alloying Chemistry of the Transition Metals,”Naturwissenschaften, 31, 91–92 (1943). (Crys Structure; Experimental)
5. 51Kar: N. Karlson, “An X-Ray Study of the Phases in the Copper-Titanium System,”J. Inst. Met., 79, 391–399 (1951). (Crys Structure; Review)