@article{UMJ_2016_2_2_a6,
     author = {Mikhail I. Sumin},
     title = {Regularization of {Pontryagin} maximum principle in optimal control of distributed systems},
     journal = {Ural mathematical journal},
     pages = {72--86},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UMJ_2016_2_2_a6/}
}