Heidi Gebauer Yoshio Okamoto Fast Exponential-Time Algorithms for the Forest Counting and the Tutte Polynomial Computation in Graph Classes. 25-44 2009 20 Int. J. Found. Comput. Sci. 1 http://dx.doi.org/10.1142/S0129054109006437 db/journals/ijfcs/ijfcs20.html#GebauerO09