@article{10_37236_868,
     author = {Amitava Bhattacharya and Shmuel Friedland and Uri N. Peled},
     title = {On the first eigenvalue of bipartite graphs},
     journal = {The electronic journal of combinatorics},
     year = {2008},
     volume = {15},
     doi = {10.37236/868},
     zbl = {1178.05061},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/868/}
}