\input zb-basic
\input zb-ioport
\iteman{io-port 50124814}
\itemau{Kuosmanen, Timo; Johnson, Andrew L.}
\itemti{Data envelopment analysis as nonparametric least-squares regression}
\itemso{Operations Research 58, No. 1, 149-160 (2010).}
\itemcc{}
\itemut{}
\itemli{doi:10.1287/opre.1090.0722}
\end