@article{KurthsSchwarzParlitzetal.1994,
  author    = {J{\"u}rgen Kurths and Udo Schwarz and Ulrich Parlitz and Charles P. Sonett},
  title     = {Testing for nonlinearity in radiocarbon data},
  url       = {http://www.agnld.uni-potsdam.de/~shw/Paper/n.ps.gz},
  year      = {1994},
}