# Physics‐Informed Neural Networks With Monotonicity Constraints for Richardson‐Richards Equation: Estimation of Constitutive Relationships and Soil Water Flux Density From Volumetric Water Content Measurements

> Research article (Water Resources Research, 2020) · cited 127× · AI/ML

**Wikidata**: [openalex:W3094438641](https://www.wikidata.org/wiki/openalex:W3094438641)  
**Source**: https://4ort.xyz/entity/physicsinformed-neural-networks-with-monotonicity-constraints-for-richardsonrichards-equation-estimation-of-constitutive