\bib{1976/anderssen-book} \yr 1976 \isbn 0--7022--1213--X \editor Robert S. Anderssen \editor Richard P. Brent \book The complexity of computational problem solving \publ University of Queensland Press \publaddr Brisbane \url http://web.comlab.ox.ac.uk/oucl/work/richard.brent/pub/pub031.html \endref