@article{PB-A2253E78BAAE40907937,
  title = {Investigation of the shape of noctilucent cloud particles by polarization lidar technique},
  author = {Gerd Baumgarten and K. H. Fricke and G. von Cossart},
  journal = {Geophysical Research Letters},
  year = {2002},
  doi = {10.1029/2001gl013877}
}