http://www.ams.org/home/page
http://www.anelis.ro/
http://www.advancesindifferenceequations.com/about/edboard
http://www.emis.de/journals/SMA
http://www.sciencepublishinggroup.com/journal/archive.aspx?journalid=148&issueid=-1
http://www.inderscience.com/jhome.php?jcode=ijfcm
http://www.utgjiu.ro/fsega/home.html