@article{santamaria2014procedural,
  title={Procedural approach to volumetric terrain generation},
  author={Santamar{\'\i}a-Ibirika, Aitor and Cantero, Xabier and Salazar, Mikel and Devesa, Jaime and Santos, Igor and Huerta, Sergio and Bringas, Pablo G},
  journal={The Visual Computer},
  volume={30},
  number={9},
  pages={997--1007},
  year={2014},
  publisher={Springer Berlin Heidelberg}
}