α -fuzzy fixed points for α -fuzzy monotone multifunctions. Stouti, A. — 2005 Acta Mathematica Universitatis Comenianae. New Series
Fixed points theorems for n -valued multifunctions. Stouti, A.; Maaden, A. — 2007 Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]