1. Cryopreservation of domestic animal species in France and the Netherlands, experiences similarities and differences;Danchin-Burge,2003
2. Free Software Foundation, GNU general public license, version 2, copyright (c) 1989, 1991, June 1991. 59 Temple Place-Suite 330, Boston, MA 02111-1307, USA.
3. Genetisch-statistische Ausschuss der Deutschen Gesellschaft für Züchtungskunde. Stellungnahme zur Bildung von Genreserven in der Tierzüchtung;Züchtungskunde,1979
4. Groeneveld, E., 1999. Design of a portable platform independent pig information system; an internet based development project. In: Schiefer, G., Rickert, U., Helbig, R., (Eds), Role and Potential of IT, Intranet and Internet for Advisory Services, Bonn. Second European Conference of the European Federation for Information Technology in Agriculture, Food and the Environment. pp. 113–128. ISBN 3-938227-08-5.
5. An adaptable platform independent information system in animal agriculture: framework and generic database structure;Groeneveld;Livestock Production Science,2004