@article{ZNSL_2020_490_a5,
     author = {N. V. Proskurin},
     title = {On character sums in finite fields},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {104--108},
     year = {2020},
     volume = {490},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2020_490_a5/}
}