1. iBliss, G. A., Lectures on the Calculus of Variations, University of Chicago Press, Chicago, 111.1946, pp.187-265.
2. 2McReynolds, S. R. "A Successive Sweep Method for Solving Optimal Programming Problems," Ph.D. thesis,1965, Dept. of Applied Mathematics, Harvard University, Cambridge, Mass.
3. On the applicability of the sweep method to optimal control problems
4. Numerical implementation of a second-order variational endpoint condition