Salvador’s research on Apple Pay while using the Proxmark3: https://salmg.net/2017/12/29/analyzing-an-apple-pay-transaction-with-proxmark3/

A solid tutorial going over several card examples: https://blog.kchung.co/rfid-hacking-with-the-proxmark-3/

Nice quick cheat sheet on dealing with Mifare cards: https://github.com/Proxmark/proxmark3/wiki/Mifare-HowTo