@article{ZNSL_2015_436_a6,
     author = {M. R. Gavrilovich and V. L. Kreps},
     title = {On a class of optimization problems with no ``effectively computable'' solution},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {122--135},
     publisher = {mathdoc},
     volume = {436},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2015_436_a6/}
}