Amplitude Variations in Pulsed Radio Sources

@article{Scheuer1968AmplitudeVI,
  title={Amplitude Variations in Pulsed Radio Sources},
  author={P A G Scheuer},
  journal={Nature},
  year={1968},
  volume={218},
  pages={920-922}
}
Refraction by irregularities in the interstellar medium may cause the long period fluctuations in the amplitudes of radio signals from the pulsed sources.