BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno C O Faria, Josiane P Principal Lopes Filho , Milton C P Principal Nussenzveig Lopes , Helena J P Principal Weak stability of Lagrangian solutions to the semigeostrophic equations October pp. 2521-2540