Jeschke, A., Pedersen, G. K., Vater, S., & Behrens, J. (2017). Depth-averaged non-hydrostatic
extension for shallow water equations with quadratic vertical pressure profile: equivalence to Boussinesq-type equations. International Journal for Numerical Methods in Fluids, 84,
569-583. doi:10.1002/fld.4361.