@article{horvath1987viscous,
  title={Viscous fingering with imposed uniaxial anisotropy},
  author={Horv{\'a}th, Viktor and Vicsek, Tam{\'a}s and Kert{\'e}sz, J{\'a}nos},
  journal={Physical Review A},
  volume={35},
  number={5},
  pages={2353},
  year={1987},
  publisher={APS}
}