@article{piessens:1986:atp,
    author = {Piessens, Robert and Ahmed, Shafique},
     title = {Approximation for the turning points of {B}essel functions},
   journal = {J. Comput. Phys.},
  fjournal = {Journal of Computational Physics},
    volume = {64},
      year = {1986},
    number = {1},
     pages = {253–257},
      issn = {0021-9991},
     coden = {JCTPAH},
   mrclass = {33A40 (65D20)},
  mrnumber = {MR843991 (87i:33018)},
mrreviewer = {Evangelos Ifantis},
       doi = {10.1016/0021-9991(86)90029-X},
     zblno = {0616.65016}}