@article{DE_2001_37_2_a14,
     author = {M. I. Sumin},
     title = {Suboptimal {Control} of a {Semilinear} {Elliptic} {Equation} with a {Phase} {Constraint} and a {Boundary} {Control}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {260--275},
     publisher = {mathdoc},
     volume = {37},
     number = {2},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2001_37_2_a14/}
}