@article{ZNSL_1997_236_a6,
     author = {S. V. Vostokov and P. M. Vinnik},
     title = {The numbers of representations of elements of $GF(p)$ as sums of $l$th degrees},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {68--72},
     year = {1997},
     volume = {236},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1997_236_a6/}
}