Timan's Formula for the Deviation of Hölder Functions. Solomon Leader — 1967 Mathematische Zeitschrift
A fixed point principle for locally expansive multifunctions Solomon Leader — 1980 Fundamenta Mathematicae
Equivalent Cauchy sequences and contractive fixed points in metric spaces Solomon Leader — 1983 Studia Mathematica
Regulated semilattices and locally compact spaces Solomon Leader; L. Finkelstein — 1971 Fundamenta Mathematicae