@article{ZNSL_1972_24_a8,
     author = {N. A. Shirokov},
     title = {On {Hayman's} regularity theorem},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {182--200},
     year = {1972},
     volume = {24},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1972_24_a8/}
}