@article{1195520002,
author = {Niwa, Toshio},
title = {A geometrical method for optimal control problem for some non-linear systems},
journal = {Proc. Japan Acad.},
volume = {47},
number = {10},
year = {1971},
pages = { 244-248},
language = {en},
url = {http://dml.mathdoc.fr/item/1195520002}
}
Niwa, Toshio. A geometrical method for optimal control problem for some non-linear systems. Proc. Japan Acad., Tome 47 (1971) no. 10, pp. 244-248. http://gdmltest.u-ga.fr/item/1195520002/