@article{1077475037,
author = {Ward, Morgan},
title = {Euler's problem on sums of three fourth powers},
journal = {Duke Math. J.},
volume = {15},
number = {1},
year = {1948},
pages = { 827-837},
language = {en},
url = {http://dml.mathdoc.fr/item/1077475037}
}
Ward, Morgan. Euler’s problem on sums of three fourth powers. Duke Math. J., Tome 15 (1948) no. 1, pp. 827-837. http://gdmltest.u-ga.fr/item/1077475037/