1. Optimum rocket trajectories;Fried;J. Appl. Phys.,1956
2. Dynamic problems of interplanetary flight;Lawden;Aeronaut. Quart.,1955
3. Maximum range of intercontinental missiles;Lawden;Aeronaut. Quart.,1957
4. Variational problems with bounded control variables;Leitmann,1962
5. The calculus of variations in applied aerodynamics and flight mechanics;Miele,1962