@article{TDM_2007_10_a12,
     author = {S. V. Polin},
     title = {Some algorithmic questions connected with the solution of the search problem without a clear criteria for checking the validity of a variant},
     journal = {Trudy po diskretnoj matematike},
     pages = {239--268},
     publisher = {mathdoc},
     volume = {10},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TDM_2007_10_a12/}
}