On the geometry of multilinear forms
  We develop a constructive process which determines all extreme points of the unit ball of the space of $m$--linear forms, $m\geq1.$ Our method provides a full characterization of the geometry of that space through finitely many elementary steps, and thus it can be extensively applied in both computational and theoretical problems. 
W.V. Cavalcante, D.M. Pellegrino, E.V. Teixeira
math.FA