\relax 
\citation{Sekine92_1}
\citation{Courant89_2}
\citation{Sloff92,Sloff93,Sieben94,Sieben97_PhD}
\bibstyle{agufull08}
\bibdata{references}
\bibcite{Courant89_2}{{1}{1989}{{\textit  {Courant and Hilbert}}}{{}}}
\bibcite{Sekine92_1}{{2}{1992}{{\textit  {Sekine and Parker}}}{{}}}
\bibcite{Sieben94}{{3}{1994}{{\textit  {Sieben}}}{{}}}
\bibcite{Sieben97_PhD}{{4}{1997}{{\textit  {Sieben}}}{{}}}
\bibcite{Sloff92}{{5}{1992}{{\textit  {Sloff}}}{{}}}
\bibcite{Sloff93}{{6}{1993}{{\textit  {Sloff}}}{{}}}