@string{Act.~Metall. = "Acta Metallurgica"}
@string{Adv.~Phys. = "Advances in Physics"}
@string{J.~Appl.~Phys. = "Journal of Applied Physics"}
@string{J.~Chem.~Phys. = "Journal of Chemical Physics"}
@string{J.~Coll.~Int.~Sci. = "Journal of Colloid and Interface Science"}
@string{Class.~Quant.~Grav. = "Classical and Quantum Gravity"}
@string{J.~Geophys.~Res. = "Journal of Geophysical Research"}
@string{J.~Phys.~C:~Solid~State~Phys. = "Journal of Physics C:Solid State Physics"}
@string{J.~Phys.~Chem. = "Journal of Physical Chemistry"}
@string{J.~Phys.:~Conds.~Matt. = "Journal of Physics: Condensed Matter"}
@string{J.~Phys.~D:~Appl.~Phys. = "Journal of Physics D: Applied Physics"}
@string{Phys.~Rev.~A = "Physical Review A"}
@string{Phys.~Rev.~B = "Physical Review B"}
@string{Phys.~Rev.~Lett. = "Physical Review Letters"}
@string{Proc.~Roy.~Soc. = "Proceedings of the Royal Society"}
@string{Rev.~Mod.~Phys. = "Reviews of Modern Physics"}
@string{Trans.~Roy.~Soc. = "Transactions of the Royal Society"}

@Article{kn:Crampin83,
    Author = {M.~Crampin},
    Year = {1983},
    Title = {Tangent bundle geometry for {L}agrangian dynamics},
    Journal = {J. Phys. A: Math. Gen.},
    Volume = {16},
    Issue = {3},
    Pages = {3755--3772},
    Abstract = {Various aspects of the differential geometry of the tangent bundle of a differentiable manifold are examined, and the results applied to time-independent Lagrangian dynamics. It is shown that a certain type (1, 1) tensor field which is part of the intrinsic geometry of a tangent bundle, being a tensorial equivalent of the projection map of tangent vectors, plays a role in Lagrangian theory scarcely less important than that of the canonical one-form on a cotangent bundle in Hamiltonian theory. Recent results in Lagrangian theory are interpreted from this new viewpoint.}
};


@Book{kn:MisnerThorne&Wheeler,
    Author = {J. A. Wheeler and K. S. Thorne and C. W. Misner},
    Year = {1971},
    Title = {Gravitation},
    Publisher = {W. H. Freeman},
    Address = {New York},
};

@Article{kn:Peldan94,
  Author = {Peter Peldan},
  Title = {Actions for Gravity, with Generalizations: A Review},
  Journal = {Classical and Quantum Gravity},
  Volume = {11},
  Pages = {1087},
  Url = {http://arxiv.org/abs/gr-qc/9305011},
  Year = {1994}
};