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@article{TM_2011_273_a0, author = {A. A. Agrachev and R. V. Gamkrelidze}, title = {The geometry of maximum principle}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {5--27}, publisher = {mathdoc}, volume = {273}, year = {2011}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_2011_273_a0/} }
A. A. Agrachev; R. V. Gamkrelidze. The geometry of maximum principle. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Modern problems of mathematics, Tome 273 (2011), pp. 5-27. http://geodesic.mathdoc.fr/item/TM_2011_273_a0/