On a problem of C. Kuratowski concerning upper semi-continuous collections J. Roberts — 1929 Fundamenta Mathematicae
A point set characterization of closed 2-dimensional manifolds J. Roberts — 1932 Fundamenta Mathematicae
Concerning some problems raised by A. Lelek L. King; J. Roberts; G. Rosenstein — 1964 Fundamenta Mathematicae
Metric dimension and equivalent metrics J. H. Roberts; F. G. Slaughert, Jr. — 1968 Fundamenta Mathematicae