@article{TRSPY_1955_44_a0,
     author = {P. S. Novikov},
     title = {On the algorithmic unsolvability of the word problem in group theory},
     journal = {Informatics and Automation},
     pages = {3--143},
     publisher = {mathdoc},
     volume = {44},
     year = {1955},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1955_44_a0/}
}