Numerical simulations of highly porous dust aggregates in the low-velocity collision regime - Implementation and calibration of a smooth particle hydrodynamics codeR. J. Geretshauser, R. Speith, C. Güttler, M. Krause and J. BlumA&A, 513 (2010) A58DOI: https://doi.org/10.1051/0004-6361/200913596