%0 Journal Article 
%F chomsky59
%A Chomsky, Noam
%T On certain formal properties of grammars
%J Information and Control
%V 2
%N 2
%P 137-167
%U http://www.diku.dk/hjemmesider/ansatte/henglein/papers/chomsky1959.pdf
%U http://dx.doi.org/10.1016/S0019-9958(59)90362-6
%D 1959
%K regexp
%K  algexp