@Article{dekker1971,
  author  = {Dekker, T. J.},
  title   = {A Floating-Point Technique for Extending the Available Precision},
  journal = {Numerische Mathematik},
  volume  = {18},
  year    = {1971},
  pages   = {224--242},
  doi     = {10.1007/BF01397083}
}