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Belytschko, T., Lu, Y. Y., & Gu, L. (1994). Element‐free Galerkin methods. International Journal for Numerical Methods in Engineering, 37(2), 229-256. https://doi.org/10.1002/nme.1620370205
Belytschko T, Lu YY, Gu L. Element‐free Galerkin methods. International Journal for Numerical Methods in Engineering. 1994;37(2):229-56.