@misc{costacabral_the_tubes_1999, 
author={Costa-Cabral, M.C.},
title={The TUBES algorithm for the exact representation of advective transport in a two-dimensional discretized flow field},
year={1999},
howpublished = {GKSS report},
note = {Online available at: \url{} (DOI). Costa-Cabral, M.: The TUBES algorithm for the exact representation of advective transport in a two-dimensional discretized flow field. GKSS 99-E-60. 1999.}}