• What’s in a Boarding Pass Barcode? http://krebsonsecurity.com/2015/10/whats-in-a-boarding-pass-barcode-a-lot/ 56 comments 6/10/2015
• What’s contained in a boarding pass barcode? http://shaun.net/2011/05/whats-contained-in-a-boarding-pass-barcode/ 18 comments 30/9/2011

• What’s in a Boarding Pass Barcode? A Lot http://krebsonsecurity.com/2015/10/whats-in-a-boarding-pass-barcode-a-lot/ 80 comments 7/10/2015 programming
• BBC News - Boarding pass barcodes 'can be read by smartphones' http://www.bbc.co.uk/news/technology-20080621 9 comments 25/10/2012 technology