@article{10_37236_968,
     author = {Petr Kolman and Tomasz Wale\'n},
     title = {Reversal distance for strings with duplicates: linear time approximation using hitting set},
     journal = {The electronic journal of combinatorics},
     year = {2007},
     volume = {14},
     doi = {10.37236/968},
     zbl = {1184.68641},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/968/}
}