@article{769416,
  author = {Ronald Wittmann and A. Yaghjian},
  title = {Spherical-Wave Expansions of Piston-Radiator Fields},
  year = {1991},
  number = {30},
  month = {1991-09-01 00:09:00},
  publisher = {Journal of the Acoustical Society of America},
  language = {en},
}