Quadrature for meshless methods

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Integration of singular enrichment functions in the generalized/extended finite element method for three‐dimensional problems (2009, unknown): “in [4].”
Meshfree Methods: Progress Made after 20 Years (2017, unknown): “Mathematical analysis ofthe effectofthe accuracyofdomainintegrationhas beenprovided, where a zero-row sum condition and corrected quadrature scheme to achieve VC conditions was proposed (Babu š ka et al. 2008, 2009).”
Addressing Integration Error for Polygonal Finite Elements Through Polynomial Projections: A Patch Test Connection (2013, unknown): “In a recent series of studies, Babuska, Banerjee and co-workers [2, 3, 46] have shown that, under a zero-sum condition or satisfaction of a discrete Green’s identity, the order of quadrature rule has to be increased with reﬁnement in order to retain optimal rates of convergence for meshless…”
An arbitrary order variationally consistent integration for Galerkin meshfree methods (2013, methodology): “Error analysis of quadrature in meshfree methods has been carried out in [27, 28], where a zero row-sum condition for improving convergence behavior has been introduced, and a correction on diagonal terms of the stiffness matrix to achieve the zero row-sum condition has been proposed.”
A new support integration scheme for the weakform in mesh‐free methods (2010, background): “[23] have also recently studied the integration constraints.”