@Article{hoult+69,
  author  = {Hoult, D. P., Fay, J. A., Forney, L. J.},
  title   = {A theory of plume rise compared with field observations},
  journal = {Journal of the Air Pollution Control Association},
  year    = 1969,
  volume  = 19,
  pages   = {585--590}
}

@Article{rao+89,
  author  = {Rao, K. S. and Eckman, R. M. and Hosker, R.P.},
  title   = {Simulation of tracer concentration data in the {B}rush {C}reek drainage flow using an integrated puff model},
  journal = {Journal of Applied Meteorology},
  year    = 1989,
  volume  = 28,
  pages   = {609--616}
}