Cтатьи с терминами и о самих Online Payment Systems

http://sixrevisions.com/tools/online-payment-systems/
http://www.awwwards.com/18-online-payment-services-and-systems.html

http://chineseseoshifu.com/blog/online-payment-methods-china.html
https://www.chinapaymentservices.com/online-payments-china