1. The theory of optimal processes—I. The maximum principle;Boltyanskii;Izvest. Akad. Nauk, SSSR, Ser. Mat.,1960
2. Optimal control processes;Pontriagin;Uspekhi Mat. Nauk,1959
3. Pontriagin's maximum principle in the theory of the optimum systems;Rozonoer;Avtomat. i Telemekh.,1959
4. Theory of Ordinary Differential Equations;Coddington,1955
5. Time optimal systems with positive and integral limits;Neustadt;Space Technology Lab. Report AR-61-0005,1961