Bibtex of Graph / Spanning subgraph

@inproceedings{Boros2007, 
     address = "Banff, Canada", 
     author = "Boros, Endre and Borys, Konrad and Elbassioni, Khaled and Gurvich, Vladimir and Makino, Kazuhisa and Rudolf, Gabor", 
     booktitle = "COCOON 2007: the 13th Annual International Conference on Computing and Combinatorics", 
     doi = "10.1007/978-3-540-73545-8_23", 
     editor = "Lin, Guohui", 
     link = "http://link.springer.com/chapter/10.1007/978-3-540-73545-8_23", 
     month = "jul", 
     pages = "222--231", 
     publisher = "Springer Berlin Heidelberg", 
     series = "Lecture Notes in Computer Science", 
     title = "Generating Minimal k-Vertex Connected Spanning Subgraphs", 
     uri = "http://link.springer.com/chapter/10.1007/978-3-540-73545-8_23", 
     volume = "4598", 
     year = "2007", 
}

@article{Nutov2009, 
     author = "Nutov, Zeev", 
     doi = "10.1016/j.dam.2008.04.026", 
     issn = "0166218X", 
     journal = "Discrete Applied Mathematics", 
     keyword = "Intersecting families,Listing,Minimal edge-covers,Steiner network", 
     link = "http://www.sciencedirect.com/science/article/pii/S0166218X08002060 http://linkinghub.elsevier.com/retrieve/pii/S0166218X08002060", 
     month = "jan", 
     number = "1", 
     pages = "112--117", 
     title = "Listing minimal edge-covers of intersecting families with applications to connectivity problems", 
     uri = "http://www.sciencedirect.com/science/article/pii/S0166218X08002060", 
     volume = "157", 
     year = "2009", 
}