%0 Journal Article 
%F hopkins2008
%A Hopkins, M.
%T The Algebraic Approach I: The Algebraization of the Chomsky Hierarchy
%J Lecture Notes in Computer Science
%V 4988
%I Springer
%U http://www.diku.dk/hjemmesider/ansatte/henglein/papers/hopkins2008.pdf
%U http://dx.doi.org/10.1007/978-3-540-78913-0_13
%D 2008
%K algexp