\startproduct linespacing

\environment env_linespacing

\section{Knuth}
\input knuth

\cite[hh2010] and \cite[Eijkhout1991].

\section{References}
\nocite[hh2010,hh2010a,hh2010b,Eijkhout1991]
\placepublications[criterium=all]

\stopproduct
