@article{10_4064_aa_23_3_257_269,
     author = {J. Bovey},
     title = {On the congruence $a_1(x_1)^k + ... + a_s(x_s)^k = N(mod p^n)$},
     journal = {Acta Arithmetica},
     pages = {257--269},
     publisher = {mathdoc},
     volume = {23},
     number = {3},
     year = {1973},
     doi = {10.4064/aa-23-3-257-269},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-23-3-257-269/}
}