TY - JOUR AU - Oliva, W. M. TI - On the chaotic behavior and the non-integrability of the four vortices problem JO - Annales de l'I.H.P. Physique théorique PY - 1991 SP - 707 EP - 718 VL - 55 IS - 2 PB - Gauthier-Villars UR - http://www.numdam.org/item/AIHPA_1991__55_2_707_0/ LA - en ID - AIHPA_1991__55_2_707_0 ER -