%0 Journal Article
%A Castilla, M. S. A. C.
%A Moauro, Vinicio
%A Negrini, Piero
%A Oliva, Waldyr Muniz
%T The four positive vortices problem : regions of chaotic behavior and the non-integrability
%J Annales de l'I.H.P. Physique théorique
%D 1993
%P 99-115
%V 59
%N 1
%I Gauthier-Villars
%U http://www.numdam.org/item/AIHPA_1993__59_1_99_0/
%G en
%F AIHPA_1993__59_1_99_0