1. Amenable semigroups;Day;Illinois J. Math.,1957
2. Fixed-point theorems for compact convex sets;Day;Illinois J. Math.,1961
3. Invariant cross-sections and invariant linear subspaces;Fan;Israel J. Math.,1964
4. Abstract harmonic analysis;Hewitt,1963
5. Unitary operators in a space with indefinite metric, Zapiski Har’kov;Iohvidov;Mat. Obšč.,1949