@article{Grotendorst1990,
  author    = {Grotendorst, Johannes},
  title     = {Approximating functions by means of symbolic computation and a general extrapolation method},
  series = {Computer Physics Communications. 59 (1990), H. 2},
  journal   = {Computer Physics Communications. 59 (1990), H. 2},
  isbn      = {0010-4655},
  pages     = {289 -- 301},
  year      = {1990},
  language  = {en}
}
@article{Grotendorst1992,
  author    = {Grotendorst, Johannes},
  title     = {Algorithms of mixed symbolic-numeric type for rational approximation},
  series = {Artificial intelligence, expert systems and symbolic computing : selected and revised papers from the IMACS 13th World Congress [on Computation and Applied Mathematics], Dublin, Ireland, July 1991 / ed. by Elias N. Houstis ...},
  journal   = {Artificial intelligence, expert systems and symbolic computing : selected and revised papers from the IMACS 13th World Congress [on Computation and Applied Mathematics], Dublin, Ireland, July 1991 / ed. by Elias N. Houstis ...},
  publisher = {North-Holland},
  address   = {Amsterdam},
  isbn      = {0-444-89703-8},
  pages     = {145 -- 154},
  year      = {1992},
  language  = {en}
}
@article{Grotendorst1991,
  author    = {Grotendorst, Johannes},
  title     = {A Maple package for transforming series, sequences and functions},
  series = {Computer Physics Communications. 67 (1991), H. 2},
  journal   = {Computer Physics Communications. 67 (1991), H. 2},
  isbn      = {0010-4655},
  pages     = {325 -- 342},
  year      = {1991},
  language  = {en}
}