@article{butler:2003:lab,
    author = {Butler, Ronald W. and Wood, Andrew T. A.},
     title = {{L}aplace approximation for {B}essel functions of matrix
              argument},
   journal = {J. Comput. Appl. Math.},
  fjournal = {Journal of Computational and Applied Mathematics},
    volume = {155},
      year = {2003},
    number = {2},
     pages = {359–382},
      issn = {0377-0427},
     coden = {JCAMDI},
   mrclass = {33C10 (33F05)},
  mrnumber = {MR1984295 (2004g:33009)},
mrreviewer = {S. Bhargava},
       doi = {10.1016/S0377-0427(02)00874-9},
     zblno = {1027.65033}}