@article{CMFD_2008_27_a1,
     author = {M. Guerra},
     title = {Generalized solutions of singular optimal control problems},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {60--184},
     publisher = {mathdoc},
     volume = {27},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2008_27_a1/}
}