References
- Lee , E.B. and Markus , L. 1977 . Foundations of optimal control theory , Vol. 391 , J. Wiley and Sons .
- Roitenberg , E. Ya. 1969 . On a sufficient condition of controllability for nonlinear systems , 1 – 28 . Vestnik Moskov. Univ . Russian
- James , E. M. 1974 . Time optimal control and the Van der Pol oscillator . J. Inst. Math. Appls , 13 ( 67 )
- Villari , Gabriele . Controllo del ciclo di Van der Pol, Tesi di Laurea in Matematica , 77 – 1976 . Univ. di Firenze .
- Alekseev , N. K. 1987 . Some questions of controllability for two-dimensional systems . Diff. Uravnenyia , 13 ( 387 ) Russian
- Conti , R. 1976 . Equazione di Van der Pol e controllo in tempo minimo, Quaderni dell'Ist. Matem , 13 – 77 . U. Dini, Univ. degli Studi di Firenze .
- Alekseev , N. K. and Rettiev , N. S. 1687,1978 . n the dependence of the controllability set on a parameter . Diff. Uravnenyia , 14 Russian
- Baitman , M. M. 1980 . On the controllability set for the Van der Pol equation . Diff. Uravnenyia , 16 ( 931 ) Russian
- Pliss , P.V. 1980 . On the continuous dependence of the controllability set on a parameter . Vestnik Leningr. Univ , 19 ( 31 ) Russian
- 1981 . On the curve of discontinuity for the controllability set of Van der Pol equation with control . Vestnik Leningr. Univ , 7 ( 59 ) Russian
- Pliss , P. V. 1983 . On local hölderianity of Bellman's function in the time optimal problem for Van der Pol equation with control . Vestnik Leningr. Univ , 7 ( 112 ) Russian
- Pliss , P. V. 1984 . On local differentiability in a neighborhood of zero of the curve of discontinuity for the controllability set of Van der Pol equation with control . Vestnik Leningr. Univ , 1 ( 28 ) Russian
- Zhifen , Zhang . 1958 . Dokl. Akad. Nauk U.S.S.R , 119 ( 659 ) Chang Chi-Fen