How to cite the tables?

I suggest to cite the tables as follows:
Grassl, Markus.
"Bounds on the minimum distance of linear codes and quantum codes."
Online available at http://www.codetables.de.
Accessed on 2014-04-24.
The algorithms behind the tables are based on the computer algebra system MAGMA.
An overview of the algorithms can be found in the following article:
Markus Grassl,
Searching for linear codes with large minimum distance. in: Wieb Bosma and John Cannon (Eds.)
Discovering Mathematics with Magma,
Springer, 2006.
links: Springer
The initial version of the tables for linear codes is based on Brouwer's tables:
Andries E. Brouwer,
Bounds on linear codes,
in: Vera S. Pless and W. Cary Huffman (Eds.),
Handbook of Coding Theory,, pp. 295-461,
Elsevier, 1998.
links: Elsevier
Here are the references in BibTeX format:
@Misc{Grassl:codetables,
  author =       "Grassl, Markus",
  title =        "{Bounds on the minimum distance of linear codes and quantum codes}",
  howpublished = "Online available at \url{http://www.codetables.de}",
  year =         "2007",
  note =         "Accessed on 2014-04-24"
}
@InCollection{Grassl06,
  author =       "Grassl, Markus",
  title =        "{Searching for linear codes with large minimum distance}",
  booktitle =    "Discovering Mathematics with Magma --- Reducing the Abstract to the Concrete",
  publisher =    "Springer",
  year =         "2006",
  editor =       "Bosma, Wieb and Cannon, John",
  volume =       "19",
  series =       "Algorithms and Computation in Mathematics",
  address =      "Heidelberg",
  pages =        "287-313"
}

@Article{Magma,
  author =       "Bosma, Wieb and Cannon, John and Playoust, Catherine",
  title =        "{The Magma Algebra System I: The User Language}",
  journal =      "Journal of Symbolic Computation",
  year =         "1997",
  volume =       "24",
  number =       "3-4",
  month =        oct,
  pages =        "235-265"
}

@InCollection{Brouwer98,
  author =       "Brouwer, Andries E.",
  title =        "{Bounds on the size of linear codes}",
  booktitle =    "Handbook of Coding Theory",
  publisher =    "Elsevier",
  year =         "1998",
  editor =       "Pless, Vera S. and Huffman, W.Cary",
  chapter =      "4",
  address =      "Amsterdam",
  pages =        "295-461"
}