@article{2111,
  author = {Zhengyu Zhang and Glaucio Paulino},
  title = {Wave propagation and dynamic analysis of smoothly graded heterogeneous continua using graded finite elements},
  year = {2007},
  journal = {International Journal of Solids and Structures},
  volume = {44},
  number = {11-12},
  pages = {3601{\textendash}3626},
  publisher = {Elsevier},
}