Preprints and unpublished technical reports

• A. Murua, Partitioned Runge-Kutta Methods for Semi-explicit Differential-Algebraic Systems of Index 2 , Technical Report EHU-KZAA-IKT-196 (1996).
• A. Murua, The shuffle Hopf algebra and the commutative Hopf algebra of rooted trees , technical report, 2003.