1. 03Koe: G.A. Koenig,Z. Kristallogr., 38, 529 (1903); as quoted in [30Kat]. (Equi Diagram; Experimental)
2. 03Ste: S. Stevanoic,Z. Kristallogr., 37, 246 (1903); as quoted in [30Kat]. (Crys Structure; Experimental)
3. Indicates key paper.05Fri: K. Friedrich, “Copper and Arsenic,”Metallurgie, 2, 477–495 (1905) in German. (Equi Diagram; Experimental; Indicates presence of a phase diagram.)
4. 06Hio: A.H. Hiorns, “Effect of Certain Elements on the Structure and Properties of Copper,”J. Soc. Chem. Ind. (London), 25, 616–623 (1906). (Equi Diagram, Meta Phases; Experimental)
5. Indicates key paper.08Fri: K. Friedrich, “Newer Investigations of the Melting Diagram of the System Copper-Arsenic and the Electrical Resistivity of Arsenic-Containing Copper,”Metallurgie, 5, 529–535 (1908) in German. (Equi Diagram; Experimental; Indicates presence of a phase diagram.)