Baire classification and infinite perceptrons Miroslav Katětov (1972) Commentationes Mathematicae Universitatis Carolinae
Baire functions and classes bounded by filters Miroslav Katětov (1975) Commentationes Mathematicae Universitatis Carolinae
Baire outer kernels of sets. Miller, Harry I. (1981) Publications de l'Institut Mathématique. Nouvelle Série