Christos Levcopoulos Ola Petersson Exploiting Few Inversions When Sorting: Sequential and Parallel Algorithms. 211-238 1996 163 Theor. Comput. Sci. 1&2 db/journals/tcs/tcs163.html#LevcopoulosP96 http://dx.doi.org/10.1016/0304-3975(95)00256-1