1. On a semicontinuous function;Novikov, P. S.;Moskov. Gos. Ped. Inst. U\v{c}. Zap.,1958
2. [BD] H. Becker and R. Dougherty, On disjoint Borel uniformizations, Adv. Math. (to appear).
3. Universal functions and generalized classes of functions;Cichoń, J.;Proc. Amer. Math. Soc.,1988
4. Decomposing Baire functions;Cichoń, J.;J. Symbolic Logic,1991
5. Biblioteka Matematyczna, Tom 51. [Mathematics Library, Vol. 51];Engelking, Ryszard,1977