1. Almost Periodic Functions;Besicovitch,1954
2. Existence and stability of solutions of a delay-differential system;Driver;Arch. Rat. Mech. Anal.,1962
3. A stability theorem for functional-differential equationI;Hale,1963
4. Stability of Motion;Karsovskiĭ,1963
5. Asymptotic stability criterion;LaSalle,1962