1. Contactless payment market by solution (payment terminal, mobile payment, transaction and data management, security and fraud management), service (professional, managed), payment mode (mobile handsets, smart cards), vertical - global forecast to 2021.
https://www.marketsandmarkets.com/Market-Reports/contactless-payments-market-1313.html
2. EMV Acquirer and Terminal Security Guidelines
3. EMV Contactless Specifications for Payment Systems, Book C-2: Kernel 2 Specification
4. EMV Integrated Circuit Card Specifications for Payment Systems, Book 2: Security and Key Management
5. EMVCo: EMV Contactless Specifications for Payment Systems, Version 2.4 (2014)