| [Lemaréchal and Oustry, 2001] 
 
   | C. Lemaréchal and F. Oustry (2001). SDP relaxations in combinatorial optimization from a Lagrangian point of view.
 In: N. Hadjisavvas and P. M. Pardalos (eds.), Advances in Convex Analysis and Global Optimization. pp. 119--134. Kluwer.
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