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4. J. H. Eaton, “An iterative solution to time-optimal control,” J. Math. Anal. Appl. 5(2), 329–344 (1962).
5. O. V. Vasil’ev and A. I. Tyatyushkin, “Numerical solution of time optimal control problems,” in Differential and Integral Equations (Irkutsk. Univ., Irkutsk, 1973), Vol. 2, pp. 57–69 [in Russian].