@article{article,
  author = {M Lewenstein and P Balcou and M Ivanov and A L{\textquoteright}huillier and P Corkum},
  title = {Theory of high harmonic generation by low frequency laser fields},
  year = {1994},
  month = {1994-01-01},
  publisher = {Physical Review A (Atomic, Molecular and Optical Physics)},
  language = {en},
}