Your search returned the following 3 documents:

3. A Lagrangian relaxation approach for the multiple sequence alignment problem
   Ernst Althaus and Stefan Canzar
   In: Combinatorial Optimization and Applications : First International Conference, COCOA 2007, Xi'an, Shaanxi, China, 2007, 267-278
   
2. Matchings in Graphs Variations of the Problem
   Kurt Mehlhorn
   In: Combinatorial Optimization and Applications : First International Conference, COCOA 2007, Xi’an, China, 2007, 1-2
   
   
1. On threshold BDDs and the optimal variable ordering problem
   Markus Behle
   In: Combinatorial Optimization and Applications : First International Conference, COCOA 2007, Xi’an, China, 2007, 124-135