@article{NguyenXuanLiuBordasetal.2013,
  author    = {Hung Nguyen-Xuan and G.R. Liu and St{\´e}phane Pierre Alain Bordas and S. Natarajan and Timon Rabczuk},
  title     = {An adaptive singular ES-FEM for mechanics problems with singular field of arbitrary order},
  journal   = {Computer Methods in Applied Mechanics and Engineering},
  pages     = {252 -- 273},
  year      = {2013},
}