@article{00942899,
title = {On Bellman spheres for linear controlled objects of second order.},
journal = {Journal of Applied Analysis},
volume = {1},
year = {1995},
pages = {13-27},
doi = {10.1515/JAA.1995.13},
zbl = {0917.49002},
language = {en},
url = {http://dml.mathdoc.fr/item/00942899}
}
Boltyanski, V.G.; Marti Vazques, J. On Bellman spheres for linear controlled objects of second order.. Journal of Applied Analysis, Tome 1 (1995) pp. 13-27. doi : 10.1515/JAA.1995.13. http://gdmltest.u-ga.fr/item/00942899/