Paola Bonizzoni Gianluca Della Vedova Riccardo Dondi Reconciling a gene tree to a species tree under the duplication cost model. 36-53 2005 347 Theor. Comput. Sci. 1-2 http://dx.doi.org/10.1016/j.tcs.2005.05.016 db/journals/tcs/tcs347.html#BonizzoniVD05