1. 21Fog: I. Fogh, “Aluminum Amalgam,”Kgl. Danske Viderskab. Selskab. Math-fys. Medd., 3 (15), 1–6 (1921) in Danish. (Equi Diagram; Experimental)
2. 25Deg: C. J. DeGruyter, “Electromotive Behavior of Al,”Rec. Trav. Chim., 44, 937–969 (1925). (Equi Diagram; Experimental)
3. 25Smi: A. Smits and H. Gerding, “The Electromotive Behavior of Al,”Z. Elektrochem., 31, 304–308 (1925) in German. (Equi Diagram; Experimental)
4. 26Dad: A. Dadieu, “On the Electromotive Behavior of Al,”Monatsh. Chem., 47, 497–510 (1926) in German. (Equi Diagram; Experimental)
5. 29Mul: R. Muller, “Studies of the Electromotive Behavior of Al and Its Amalgams,”Z. Elektrochem., 35, 240–249 (1929) in German. (Equi Diagram; Experimental)