A general continuity principle Wittmann, Rainer Wittmann, Rainer (1984) Commentationes Mathematicae Universitatis Carolinae
A note on continuity principle in potential theory Josef Král (1984) Commentationes Mathematicae Universitatis Carolinae
A Note on ?-Equilibrium Measures for Rational Maps. Artur Oscar Lopes (1989) Mathematische Zeitschrift
A Potential-Theoretic Approach to Parallel Addition. Heinz Leutwiler, Sirkka-Liisa Eriksson (1986) Mathematische Annalen
Applications harmoniques stables Jean-Claude Mitteau (1976) Mémoires de la Société Mathématique de France