Kamien, Morton I.; Schwartz, Nancy L. (1991). "Discontinuous and Bang-Bang Control". Dynamic Optimization : The Calculus of Variances and Optimal Control in Economics and Management (Second ed.). Amsterdam: North-Holland. pp. 202–208. ISBN0-444-01609-0. Archived from the original on 2022-01-25. Retrieved 2022-01-25.
web.archive.org
Kamien, Morton I.; Schwartz, Nancy L. (1991). "Discontinuous and Bang-Bang Control". Dynamic Optimization : The Calculus of Variances and Optimal Control in Economics and Management (Second ed.). Amsterdam: North-Holland. pp. 202–208. ISBN0-444-01609-0. Archived from the original on 2022-01-25. Retrieved 2022-01-25.