\relax 
\citation{einstein}
\citation{einstein}
\citation{einstein,burkhardt,chandrasekhar,pannekoek,pringle:ibs}
\citation{kuip:ds1,kuip:ds2}
\citation{kuip:ds1,kuip:ds2}
\citation{*}
\bibdata{mnemonic,example}
\bibcite{blaauw}{\astroncite {Blaauw}{1955}}
\bibcite{hplot}{\astroncite {Brun et\penalty \@M \ al.}{1986}}
\bibcite{burkhardt}{\astroncite {Burkhardt et\penalty \@M \ al.}{1990}}
\bibcite{chandrasekhar}{\astroncite {Chandrasekhar}{1967}}
\bibcite{einstein}{\astroncite {Einstein}{1911}}
\bibcite{fokker}{\astroncite {Fokker}{1972}}
\bibcite{hogeveen}{\astroncite {Hogeveen}{1990}}
\bibcite{kuip:ds1}{\astroncite {Kuiper}{1935a}}
\bibcite{kuip:ds2}{\astroncite {Kuiper}{1935b}}
\bibcite{menzel}{\astroncite {Menzel}{1970}}
\bibcite{ott}{\astroncite {Ott}{1989}}
\bibcite{pannekoek}{\astroncite {Pannekoek}{1902}}
\bibcite{pringle:ibs}{\astroncite {Pringle and Wade}{1985}}
\bibstyle{astron}