Common fixed points and fixed edges for monotone mappings in posets Rade M. Dacić — 1990 Colloquium Mathematicae
Properties of monotone mappings in partially ordered sets. Dacic, Rade M. — 1981 Publications de l'Institut Mathématique. Nouvelle Série
On fixed edges of antitone self-mappings of complete lattices. Dacić, Rade M. — 1983 Publications de l'Institut Mathématique. Nouvelle Série