BibTeX
@ARTICLE{
         Berz1989DAD,
       author = "Martin Berz",
       title = "Differential Algebraic Description of Beam Dynamics to Very High Orders",
       journal = "Particle Accelerators",
       key = "Berz1989DAD",
       referred = "[Berz91a], [Berz1996CIa], [Fuchi1996a], [Hoefkens2001EHO], [Juedes1991ATo],
         [Klein2001DMf], [Pusch1996JSa], [Shamseddine1996EHi].",
       year = "1989",
       volume = "24",
       pages = "109"
}