\begin{thebibliography}{Knu86}

\bibitem[Hob86]{Hobby86}
John~D. Hobby.
\newblock Smooth, easy to compute interpolating splines.
\newblock {\em Discrete Comput. Geom.}, 1:123--140, 1986.

\bibitem[Knu86]{Knuth86b}
Donald~E. Knuth.
\newblock {\em The METAFONTbook}.
\newblock Addison-Wesley, Reading, Massachusetts, 1986.

\end{thebibliography}