%0 Journal Article %A Freitas, Pedro %A Siudeja, Batłomiej %T Bounds for the first Dirichlet eigenvalue of triangles and quadrilaterals %J ESAIM: Control, Optimisation and Calculus of Variations %D 2010 %P 648-676 %V 16 %N 3 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/cocv/2009018/ %R 10.1051/cocv/2009018 %G en %F COCV_2010__16_3_648_0