@article{genuchten1980,
  title={A Closed‐form Equation for Predicting the Hydraulic Conductivity of Unsaturated Soils},
  author={Martinus Th. van Genuchten},
  year={1980},
  journal={Soil Science Society of America Journal},
  doi={10.2136/sssaj1980.03615995004400050002x},
  url={https://doi.org/10.2136/sssaj1980.03615995004400050002x}
}