@article{ZNSL_2008_358_a0,
     author = {J. Almeida and M. V. Volkov and S. V. Gol'dberg},
     title = {Complexity of the identity checking problem for finite semigroups},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--22},
     publisher = {mathdoc},
     volume = {358},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2008_358_a0/}
}