\input zb-basic
\input zb-ioport
\iteman{io-port 70637735}
\itemau{Escribano, Carmen; Giraldo, Antonio; Sastre, Mar{\'\i}a Asunci\'on}
\itemti{Thinning algorithms as multivalued $N${\mathcal{N}}-retractions}
\itemso{DGCI, 275-287 (2009).}
\itemcc{}
\itemut{}
\itemli{doi:10.1007/978-3-642-04397-0\_24}
\end