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Journal of Homotopy and Related Structures > 2013 > 8 > 1 > 141-150
Applied Categorical Structures > 2007 > 15 > 4 > 415-437
Journal of Homotopy and Related Structures > 2013 > 8 > 1 > 141-150
Applied Categorical Structures > 2007 > 15 > 4 > 415-437