@article{burrell:1974:aem,
    author = {Burrell, Keith H.},
     title = {Algorithm 484: Evaluation of the modified {B}essel
              functions {K0(Z)} and {K1(Z)} for complex arguments},
   journal = {Comm. ACM},
    volume = {17},
      year = {1974},
    number = {9},
     pages = {524–526},
      note = {Double-precision Fortran code, maximum accuracy 13S.},
      issn = {0001-0782},
       doi = {10.1145/361147.361113},
     links = {\URL[Code]{http://portal.acm.org/supp_gateway.cfm?id=361113&type=gz&path=%2F370000%2F361113%2Fsupp%2F484%2Egz&coll=GUIDE&dl=ACM,ACM&CFID=14054510&CFTOKEN=48678964http://cpc.cs.qub.ac.uk/summaries/ACXM}}}