@article{1102982973,
author = {Kelley, Al},
title = {Analytic two-dimensional subcenter manifolds for systems with an integral.},
journal = {Pacific J. Math.},
volume = {31},
number = {3},
year = {1969},
pages = { 335-350},
language = {en},
url = {http://dml.mathdoc.fr/item/1102982973}
}
Kelley, Al. Analytic two-dimensional subcenter manifolds for systems with an integral.. Pacific J. Math., Tome 31 (1969) no. 3, pp. 335-350. http://gdmltest.u-ga.fr/item/1102982973/