Convergence of a multiscale finite element method for elliptic problems with rapidly oscillating coefficients T Hou, XH Wu, Z Cai Mathematics of computation 68 (227), 913-943, 1999 | 774 | 1999 |

On the finite volume element method Z Cai Numerische Mathematik 58 (1), 713-735, 1990 | 508 | 1990 |

First-order system least squares for second-order partial differential equations: Part I Z Cai, R Lazarov, TA Manteuffel, SF McCormick SIAM Journal on Numerical Analysis 31 (6), 1785-1799, 1994 | 441 | 1994 |

The finite volume element method for diffusion equations on general triangulations Z Cai, J Mandel, S McCormick SIAM Journal on Numerical Analysis 28 (2), 392-402, 1991 | 309 | 1991 |

First-order system least squares for second-order partial differential equations: Part II Z Cai, TA Manteuffel, SF McCormick SIAM Journal on Numerical Analysis 34 (2), 425-454, 1997 | 291 | 1997 |

On the accuracy of the finite volume element method for diffusion equations on composite grids Z Cai, S McCormick SIAM Journal on Numerical Analysis 27 (3), 636-655, 1990 | 233 | 1990 |

First-order system least squares for the Stokes equations, with application to linear elasticity Z Cai, TA Manteuffel, SF McCormick SIAM Journal on Numerical Analysis 34 (5), 1727-1741, 1997 | 213 | 1997 |

Control‐volume mixed finite element methods Z Cai, JE Jones, SF McCormick, TF Russell Computational Geosciences 1, 289-315, 1997 | 188 | 1997 |

Discontinuous Galerkin finite element methods for interface problems: a priori and a posteriori error estimations Z Cai, X Ye, S Zhang SIAM journal on numerical analysis 49 (5), 1761-1787, 2011 | 147 | 2011 |

Least-squares methods for linear elasticity Z Cai, G Starke SIAM Journal on Numerical Analysis 42 (2), 826-842, 2004 | 147 | 2004 |

Least-squares methods for incompressible Newtonian fluid flow: Linear stationary problems Z Cai, B Lee, P Wang SIAM Journal on Numerical Analysis 42 (2), 843-859, 2004 | 134 | 2004 |

Analysis of Velocity-Flux First-Order System Least-Squares Principles for the Navier--Stokes Equations: Part I P Bochev, Z Cai, TA Manteuffel, SF McCormick SIAM Journal on Numerical Analysis 35 (3), 990-1009, 1998 | 133 | 1998 |

A stable nonconforming quadrilateral finite element method for the stationary Stokes and Navier–Stokes equations Z Cai, J Douglas, X Ye Calcolo 36, 215-232, 1999 | 118 | 1999 |

A finite element method using singular functions for the Poisson equation: corner singularities Z Cai, S Kim SIAM Journal on Numerical Analysis 39 (1), 286-299, 2001 | 114 | 2001 |

Mixed finite element methods for incompressible flow: stationary Stokes equations Z Cai, C Tong, PS Vassilevski, C Wang Numerical Methods for Partial Differential Equations: An International …, 2010 | 104 | 2010 |

Recovery-based error estimator for interface problems: conforming linear elements Z Cai, S Zhang SIAM Journal on Numerical Analysis 47 (3), 2132-2156, 2009 | 102 | 2009 |

First-order system least squares for velocity-vorticity-pressure form of the Stokes equations, with application to linear elasticity Z Cai, TA Manteuffel, SF McCormick Electronic Transactions on Numerical Analysis (ETNA) 3, 150-159, 1995 | 96 | 1995 |

First-order system least squares for the stress-displacement formulation: linear elasticity Z Cai, G Starke SIAM journal on numerical analysis 41 (2), 715-730, 2003 | 94 | 2003 |

First-order system least squares (FOSLS) for planar linear elasticity: Pure traction problem Z Cai, TA Manteuffel, SF McCormick, SV Parter SIAM journal on numerical analysis 35 (1), 320-335, 1998 | 86 | 1998 |

Deep least-squares methods: An unsupervised learning-based numerical method for solving elliptic PDEs Z Cai, J Chen, M Liu, X Liu Journal of Computational Physics 420, 109707, 2020 | 84 | 2020 |