@article{ZNSL_1995_227_a0,
     author = {G. V. Abramov and P. M. Vinnik},
     title = {Computation of the number of representations of the elements of the ring $\mathbb Z/d\mathbb Z$ as a~sum of squares},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--8},
     publisher = {mathdoc},
     volume = {227},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1995_227_a0/}
}