\begin{thebibliography}{4}
\expandafter\ifx\csname natexlab\endcsname\relax\def\natexlab#1{#1}\fi

\bibitem[{{Bryce} \& {Mellema}(1999)}]{1999MNRAS.309..731B}
{Bryce}, M. \& {Mellema}, G. 1999, \mnras, 309, 731

\bibitem[{{Campbell}(1893)}]{1893PASP....5..204C}
{Campbell}, W.~W. 1893, \pasp, 5, 204

\bibitem[{{Ludwig} {et~al.}(2008){Ludwig}, {Caffau}, \& {Ku{\v
  c}inskas}}]{2008IAUS..252...75L}
{Ludwig}, H.-G., {Caffau}, E., \& {Ku{\v c}inskas}, A. 2008, in IAU Symposium,
  Vol. 252, IAU Symposium, ed. L.~{Deng} \& K.~L. {Chan}, 75--81

\bibitem[{{Strassmeier} {et~al.}(2012){Strassmeier}, {Weber}, {Granzer}, \&
  {J{\"a}rvinen}}]{2012AN....333..663S}
{Strassmeier}, K.~G., {Weber}, M., {Granzer}, T., \& {J{\"a}rvinen}, S. 2012,
  Astronomische Nachrichten, 333, 663

\end{thebibliography}
