Manfred Kudlek and Benedek Nagy.
Distances of formal languages.
Pure Mathematics and Applications - PU.MA, 17(3-4):349-357,
2008.
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@Article{Kudlek+08b, author = {Kudlek, Manfred and Nagy, Benedek}, title = {Distances of Formal Languages}, journal = {Pure Mathematics and Applications -- PU.MA}, year = 2008, volume = 17, number = {3--4}, pages = {349--357}, url = {http://www.bke.hu/puma/} }