@article{TMF_1988_77_1_a3,
     author = {I. L. Buchbinder and S. V. Ketov},
     title = {Single-loop counterterm for 4-dimensional {Sigma} model with higher derivatives},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {42--50},
     year = {1988},
     volume = {77},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1988_77_1_a3/}
}