Le, Canh V., Phuc L. H. Ho, and Hoa T. Nguyen. 2016. “Airy-Based Equilibrium Mesh-Free Method for Static Limit Analysis of Plane Problems”. Vietnam Journal of Mechanics 38 (3). Hanoi, Vietnam:167-79. https://doi.org/10.15625/0866-7136/38/3/5961.