\input zb-basic \input zb-ioport \iteman{io-port 70140345} \itemau{Hinsberger, Uwe; Kolla, Reiner; Wild, Markus} \itemti{A parallel hybrid approach to hard optimization problems} \itemso{ARCS, 201-210 (1997).} \itemcc{} \itemut{} \itemli{} \end