@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" }