@article{ZNSL_1991_192_a4,
     author = {I. N. Ponomarenko},
     title = {Polynomial-time recognizing and isomorphism testing for cyclic tournaments},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {74--111},
     publisher = {mathdoc},
     volume = {192},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1991_192_a4/}
}