\input zb-basic
\input zb-ioport
\iteman{io-port 70121696}
\itemau{Cleju, Ioan; Fr\"anti, Pasi; Wu, Xiaolin}
\itemti{Clustering based on principal curve}
\itemso{SCIA, 872-881 (2005).}
\itemcc{}
\itemut{}
\itemli{doi:10.1007/11499145\_88}
\end