@article{poquerusse:1999:faf,
    author = {Poqu{\'e}russe, A. and Alexiou, S.},
     title = {Fast analytic formulas for the modified {B}essel functions of
              imaginary order for spectral line broadening calculations},
   journal = {J. Quantit. Spec. and Rad. Trans.},
  fjournal = {Journal of Quantitative Spectroscopy and Radiative Transfer},
    volume = {62},
      year = {1999},
    number = {4},
     pages = {389–395},
       doi = {10.1016/S0022-4073(98)00109-5}}