@inproceedings{LaburtaSantamaría:3275,
      author       = "Calvo, M. and Laburta Santamaría, María Pilar and
                      Montijano, Juan I. and Rández, Luis",
      title        = "Approximate preservation of quadratic invariants by
                      explicit Runge-Kutta methods ",
      booktitle    = "PAMM · Proc. Appl. Math. Mech.",
      year         = "2007",
}