Update checklist

Author: davidlmobley

paper/basic_training.pdf

@@ -1176,7 +1176,7 @@ \subsubsection{Grid based Ewald summation}
 \begin{checklist}{Determine handling of cutoffs}
 \begin{itemize}
 \item As a general rule, electrostatics are long-range enough that either the cutoff needs to be larger than the system size (for finite systems) or
-periodicity is needed along with full treatment of long-range electrostatics (Section~\cite{lr_electrostatics})
+periodicity is needed along with full treatment of long-range electrostatics (Section~\ref{lr_electrostatics})
 \item Nonpolar interactions can often be safely treated with cutoffs of 1-1.5 nm as long as the system size is at least twice that, but long-range dispersion corrections may be needed (Section~\ref{sec:force_fields})
 \end{itemize}
 \end{checklist}