\input zb-basic
\input zb-ioport
\iteman{io-port 70914078}
\itemau{Thielen, Clemens; Westphal, Stephan}
\itemti{Approximating the traveling tournament problem with maximum tour length 2}
\itemso{ISAAC (2), 303-314 (2010).}
\itemcc{}
\itemut{}
\itemli{doi:10.1007/978-3-642-17514-5\_26}
\end