Alberto Moraglio1, Yong-Hyuk Kim, Yourim Yoon, Byung-Ro Moon, and Riccardo Poli1
"Cycle Crossover for Permutations with Repetitions Application to Graph Partitioning."
Technical Report CSM-454
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In previous work, we have applied geometric crossover to simple permutations.

[8] Moraglio, A., and Poli, R. (2004) "Topological interpretation of crossover." Proceedings of the Genetic and Evolutionary Computation Conference (2004), pp. 1377-1388.