Sergei L. Bezrukov Robert Elsässer Burkhard Monien Robert Preis Jean-Pierre Tillich New spectral lower bounds on the bisection width of graphs. 155-174 2004 320 Theor. Comput. Sci. 2-3 http://dx.doi.org/10.1016/j.tcs.2004.03.059 db/journals/tcs/tcs320.html#BezrukovEMPT04