1. Many-valued mappings and Borel sets II;Choban;Trans. Moscow Math. Soc.,1970
2. Topological well-ordering and continuous selections;Engelking;Invent. Math.,1965
3. Topologies on spaces of subsets;Michael;Trans. Amer. Math. Soc.,1951
4. Selections that characterize topological completeness;van Mill;Fund. Math.,1996
5. Selections and orderability;van Mill,1981