Clustering based approach extracting collocations
  The following study presents a collocation extraction approach based on clustering technique. This study uses a combination of several classical measures which cover all aspects of a given corpus then it suggests separating bigrams found in the corpus in several disjoint groups according to the probability of presence of collocations. This will allow excluding groups where the presence of collocations is very unlikely and thus reducing in a meaningful way the search space. 
Mohamed Achraf Ben Mohamed, Mounir Zrigui and Mohsen Maraoui
cs.CL