@misc{werner_the_gcs_1990, 
author={Werner, K.-D.},
title={The GCS method for constructing the entropy solution of hyperbolic conservation laws and applications},
year={1990},
howpublished = {GKSS report},
note = {Werner, K.: The GCS method for constructing the entropy solution of hyperbolic conservation laws and applications. GKSS 90-E-40. 1990.}}