%0 book part
%@ 
%A Heerens, J.,Hellmann, D.

%D 2001
%J The Life of a Crack, Initiation - Growth - Fracture, Manuscript 9
%N 
%P  

%T Thickness Contraction and Ligament Contraction - Two Quantities to Analyse constraint Effects on Ductile Fracture Toughness
%U 
 
%X