[1] Plessey Code
[2] MSI Symbology
[3] Free Online MSI Plessey Barcodes Generator
[4] Linear Barcode Symbology : MSI Plessey
[5] MSI Barcode (Modified Plessey Barcode)
[6] Plessey
[7] About Plessey Barcode
[8] Luhn algorithm
