@article{GDZPPN002026481,
title = {Estimates for En (Xn + 2m).},
journal = {Aequationes mathematicae},
volume = {8},
year = {1972},
pages = {258-262},
zbl = {0256.41017},
url = {http://dml.mathdoc.fr/item/GDZPPN002026481}
}
Johnson, L.W.; Riess, R.D. Estimates for En (Xn + 2m).. Aequationes mathematicae, Tome 8 (1972) pp. 258-262. http://gdmltest.u-ga.fr/item/GDZPPN002026481/