1. Extended dynamical systems and stability theory;Hale,1967
2. Methods of A. M. Liapunov and their Application;Zubov,1964
3. A stability theorem for functional differential equations;Hale,1963
4. Sufficient conditions for stability and instability of autonomous functional differential equations;Hale;J. Diff. Eqs.,1965
5. Existence, uniqueness, continuity and continuation of solutions for retarded differential equations;Hale;Bol. Soc. Mat. Mex.,1967