@Article{ HertrampfM10a, title = "Resource bounded frequency computations with three errors", journal = "Algorithmica", year = "2010", volume = "56", number = "3", pages = "342--363", issn = "0178-4617", doi = "10.1007/s00453-009-9330-3", author = "Hertrampf, Ulrich and Minnameier, Christoph" }