@article{DM_1989_1_4_a10,
     author = {S. S. Martynov},
     title = {Complexity of some problems in editing words},
     journal = {Diskretnaya Matematika},
     pages = {104--112},
     publisher = {mathdoc},
     volume = {1},
     number = {4},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1989_1_4_a10/}
}