@article{Leyser2012a,
author = "T. B. Leyser and F. Waldemarsson and S. C. Buchert",
title = "Plasma angular momentum effects and twisted incoherent scatter radar beams",
year = 2012 ,
journal = "Radio Sci.",
volume = 47,
number = 5,
keywords = "amisr, pfisr",
doi = "10.1029/2011RS004819"
}