@article{11092,
  author = {Aslak Tveito and Ragnar Winther},
  title = {The Solution of Nonstrictly Hyperbolic Systems of Conservation Laws May Be Hard to Compute},
  year = {1995},
  journal = {SIAM J. Sci. Comput.},
  volume = {16},
  pages = {320-329,},
}