Bibtex of Graph / Bounded union

@article{Damaschke2006, 
     author = "Damaschke, Peter", 
     doi = "10.1016/j.tcs.2005.10.004", 
     issn = "03043975", 
     journal = "Theoretical Computer Science", 
     keyword = "Enumeration,Parameterized complexity,Perfect phylogeny,Transversal,Vertex cover", 
     link = "http://www.sciencedirect.com/science/article/pii/S0304397505006286 http://linkinghub.elsevier.com/retrieve/pii/S0304397505006286", 
     month = "feb", 
     number = "3", 
     pages = "337--350", 
     title = "Parameterized Enumeration, Transversals, and Imperfect Phylogeny Reconstruction", 
     uri = "http://www.sciencedirect.com/science/article/pii/S0304397505006286", 
     volume = "351", 
     year = "2006", 
}