homepages/g/IanPGoulden,
Ian P. Goulden and I. P. Goulden, Home Page, http://www.math.uwaterloo.ca/~ipgoulden/, University of Waterloo, Department of Mathematics, Canada
homepages/d/VictorMDeLaLuz,
Victor M. DeLaLuz and Victor De La Luz and Victor Delaluz, Home Page, http://www.cse.psu.edu/~delaluzp/, Penn State, University Park, USA
homepages/g/RaffaellaGentilini,
Raffaella Gentilini, Home Page, http://rsg.informatik.uni-kl.de/people/gentilini/index.html, Kaiserslautern University of Technology, Germany
homepages/d/TDeiss,
Thomas Deiß, Home Page, http://www-madlener.informatik.uni-kl.de/staff/deiss/deiss_en.html, Kaiserslautern University of Technology, Germany
homepages/36/7447,
Andreas Benzing, Home Page, http://www.ipvs.uni-stuttgart.de/abteilungen/vs/abteilung/mitarbeiter/andreas.benzing, University of Stuttgart, Germany
homepages/36/10919,
Karolin Kappler and Karolin Eva Kappler, Home Page, http://www.fernuni-hagen.de/soziologie/team/lg2/karolin.kappler.shtml, University of Hagen, Germany