1. ^¹ {{cite web |title=FCX Overview |work=Springdata |publisher= |date=2006-08-26 |url=http://www.springdata.co.uk/products/fcx/overview.html |doi= |accessdate=2008-06-16 |archiveurl=https://web.archive.org/web/20080605103445/http://www.springdata.co.uk/products/fcx/overview.html |archivedate=2008-06-05 |deadurl=yes |df= }}
2. ^{{cite web |title = FCX file compression for VMS, AIX, HP-UX, Solaris, Windows, and Linux |work = Compact Data Works' website |publisher = Compact Data Works |date = |url = http://fcx-file-compression.com/FCXVersion7.htm |accessdate = 2006-08-26 |deadurl = yes |archiveurl = https://web.archive.org/web/20080303001032/http://www.fcx-file-compression.com/FCXVersion7.htm |archivedate = 2008-03-03 |df = }}