Giuseppe M. Giordano, Paolo Longhi, Torquato Mussini, Sandra Rondinini; Standard potentials in water for the potassium amalgam electrode from 283.15 to 343.15 K and for the potassium electrode at 298.15 K, and thermodynamic functions for dilute potassium amalgams and for aqueous potassium chloride; The Journal of Chemical Thermodynamics; Volume 9, Issue 10, October 1977, Pages 997–1004 - www.sciencedirect.com