Concerning the measurable boundaries of a real function

Instytut Matematyczny Polskiej Akademii Nauk / Institute of Mathematics / Publishing house / Journals and Serials / Fundamenta Mathematicae / All issues

C. Goffman, R. Zink Fundamenta Mathematicae 48 (1960), 105-111 DOI: 10.4064/fm-48-2-105-111