1. 1893Joa: A. Joannis, “Action of Oxygen on ‘Sodammonium’ and Potassammonium”,Compt. Rend. Acad. Sci. Paris, 116, 1370–1373 (1893) in French; cited by N.-G. Vannerberg, “Peroxides, Superoxides and ozonides of the Metals of Groups Ia, IIa, and IIb”Prog. Inorg. Chem., 4, 125–197 (1962) (Crys Structure, Review) (Metal Phases; Experimental)
2. 1898For1: R. de Forcrand, “On the Oxides of Sodium”,Compt. Rend. Acad. Sci. Paris, 127, 364–366 (1898) in French. (Thermo; Experimental)
3. 1898For2: R. de Forcrand, “Thermal Study of the Sub-Oxide and Dioxide of Sodium”,Compt. Rend. Acad. Sci. Paris, 127, 514–516 (1898) in French. (Thermo; Experimental)
4. 14Bri: P.W. Bridgman, “Change of Phase under Pressure. I. The Phase Diagram of Eleven Substances with Especial Reference to the Melting Curve”,Phys. Rev. (2nd Ser.), 3(3), 153–203 (1914). (Pressure; Experimental)
5. 33Tze: M. Tzentnershver and M. Blumenthal, “Formation and Dissociation of the Peroxides of the Alkali Metals”,Bull. Intern. Acad. Pol., Classe Sci., Math. Nat.,1933A, 499-522; cited by [62Van]. N.-G. Vannerberg, “Peroxides, Superoxides and ozonides of the Metals of Groups Ia, IIa and IIb”Prog. Inorg chem., 4, 125–197. (1962) (Crys Structure, Review) (Thermo; Experimental)