Alan L. Rockwood: Meaning and Measurability of Single-Ion Activities, the Thermodynamic Foundations of pH, and the Gibbs Free Energy for the Transfer of Ions between Dissimilar Materials. In: ChemPhysChem. Band16, Nr.9, 2015, S.1978–1991, doi:10.1002/cphc.201500044, PMID 25919971.
Alan L. Rockwood: Meaning and Measurability of Single-Ion Activities, the Thermodynamic Foundations of pH, and the Gibbs Free Energy for the Transfer of Ions between Dissimilar Materials. In: ChemPhysChem. Band16, Nr.9, 2015, S.1978–1991, doi:10.1002/cphc.201500044, PMID 25919971.