@article{TIMM_2011_17_1_a18,
     author = {M. I. Sumin},
     title = {Dual regularization and {Pontryagin's} maximum principle in a~problem of optimal boundary control for a~parabolic equation with nondifferentiable functionals},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {229--244},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2011_17_1_a18/}
}