Researchers have presented many kinds of meshless methods, including the diffuse element method (DEM) [31], the smoothed particle hydrodynamics (SPH) method [32], the reproducing kernel particle method (RKPM) [33], the element-free Galerkin (EFG) method [34-37], the meshless local Petrov-Galerkin method (MLPG) [38-40], the hp-meshless cloud method [41], boundary element-free method (BEFM) [42, 43], the complex variable meshless method [44, 45], radius basis functions (RBF) [46], and LBIE method [47].
Kitipornchai, "Boundaryelementfree method (BEFM) and its application to two-dimensional elasticity problems," International Journal for Numerical Methods in Engineering, vol.