%0 Journal Article %A Nguyen, Vinh Duc %T On periodic subsolutions to steady second-order systems and applications %J Comptes Rendus. Mathématique %D 2019 %P 721-728 %V 357 %N 9 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.crma.2019.09.002/ %R 10.1016/j.crma.2019.09.002 %G en %F CRMATH_2019__357_9_721_0