On the Existence Almost Everywhere of the Cross Partial Derivatives. D.H. Tucker; R.J. Easton; S. Wayment — 1967 Mathematische Zeitschrift
Metric characterizations of hyperbolic and Euclidean spaces J. E. Valentine; S. G. Wayment — 1972 Colloquium Mathematicae
A local metric characterization of Banach spaces J. E. Valentine; S. G. Wayment — 1981 Colloquium Mathematicae
Metric characterizations of Banach spaces J. E. Valentine; S. G. Wayment — 1973 Colloquium Mathematicae