Resumen de Sur l'intégration symplectique de la structure de poisson singuliére Λ = (x2 + y2) ∂/∂x Λ ∂/∂y de R2
Fernando Alcalde Cuesta 
, Pierre Dazord, Gilbert Hector
The purpose of this note is to give an example of a singular Poisson structure on R2 which admits a symplectic realization by a Lie groupoid.
