%0 Journal Article 
%F ems2009
%A Engelfriet, J.
%A Maneth, S.
%A Seidl, H.
%T Deciding equivalence of top-down XML transformations in polynomial time
%J Journal of Computer and System Sciences
%V 75
%N 5
%P 271-286
%I Elsevier
%U http://www.diku.dk/hjemmesider/ansatte/henglein/papers/engelfriet2009.pdf
%D 2009
%K algexp