Electrode potentials.- Reference redox systems in non-aqueous systems and the relation of electrode potentials in non-aqueous and mixed solvents to standard potentials in water.- Liquid junction potentials.- Salt bridges and diaphragms.- Reference electrodes for aqueous solutions.- Reference Electrodes for Use in Nonaqueous Solutions.- Reference electrodes for ionic liquids and molten salts.- Reference Electrodes in Oxidic Glass Melts.- Reference electrodes for solid electrolyte devices.- Direct solid contact in reference electrodes.- Micro reference electrodes.- Conducting polymer based reference electrodes.- Screen-printed, disposable, reference electrodes.- Pseudo-reference electrodes.- The Kelvin Probe technique as reference electrode for application on thin and ultra-thin electrolyte films.