Sabrina Mantaci Antonio Restivo Giovanna Rosone Marinella Sciortino A New Combinatorial Approach to Sequence Comparison. 411-429 2008 42 Theory Comput. Syst. 3 http://dx.doi.org/10.1007/s00224-007-9078-6 db/journals/mst/mst42.html#MantaciRRS08