\begin{thebibliography}{}
\expandafter\ifx\csname natexlab\endcsname\relax\def\natexlab#1{#1}\fi

\bibitem[{{Richmond} {et~al.}(1993){Richmond}, {Treffers}, \&
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{Richmond}, M., {Treffers}, R.~R., \& {Filippenko}, A.~V. 1993, \pasp, 105,
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\bibitem[{{Richmond} \& {Knapp}(1986)}]{1986AJ.....91..517R}
{Richmond}, M.~W., \& {Knapp}, G.~R. 1986, \aj, 91, 517

\end{thebibliography}
