@misc{indiciaedd9cdbe4e55d,
  title = {Multigrid methods for differential equations with highly oscillatory coefficients},
  author = {Engquist, Bjorn and Luo, Erding},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19940019212},
  note = {Source identifier: 19940019212}
}