\input zb-basic
\input zb-ioport
\iteman{io-port 70891032}
\itemau{Mart{\'\i}n, Domingo; Arroyo, Germ\'an; Luz\'on, M. Victoria; Isenberg, Tobias}
\itemti{Example-based stippling using a scale-dependent grayscale process}
\itemso{NPAR, 51-61 (2010).}
\itemcc{}
\itemut{}
\itemli{doi:10.1145/1809939.1809946}
\end