@article{2203,
  author = {A. Lytle and Xiaoshi Zhang and R. Sandberg and O. Cohen and Henry Kapteyn and Margaret Murnane},
  title = {Quasi-phase matching and characterization of high-order harmonic generation in hollow waveguides using counterpropagating light},
  year = {2008},
  journal = {Optics Express},
  volume = {16},
  pages = {6544},
  month = {2008-01},
  doi = {10.1364/OE.16.006544},
}