@string{tcs="Theoretical Computer Science"} @ARTICLE{I85AbelianGroups, AUTHOR = "Costas S. Iliopoulos", TITLE = "Computing on general abelian groups is hard", JOURNAL = TCS, YEAR = "1985", volume = "41", number = "1", pages = "81--93", month = "", note = "", abstract = "", keywords = "", source = "" }