1. Sorting by transposition;Bafna;SIAM Journal on Discrete Mathematics,1998
2. Genome rearrangements and sorting by reversals;Bafna;SIAM Journal on Computing,1999
3. Block sorting is hard;Bein;International Journal of Foundations of Computer Science,2003
4. A faster and simpler 2-approximation algorithm for block sorting;Bein,2005
5. Sorting by reversals is difficult;Caprara,1997