Concerning the disconnection of continua by the omission of pairs of their points Gordon Whyburn — 1927 Fundamenta Mathematicae
Concerning the proposition that every closed, compact, and totally disconnected set of points is a subset of an are Gordon Whyburn — 1932 Fundamenta Mathematicae
Sur les éléments cycliques et leurs applications Casimir Kuratowski; Gordon Whyburn — 1930 Fundamenta Mathematicae