Being refuted about what? You made a request for sources about grappling from a part of the world you're unfamiliar with, I delivered. It was for your benefit/education, that's all. You're acting as if we're debating, we're not. You're the one making arguments, ie the De La Riva guard is some sort of martial innovation (even though it's found in Judo and infinite leg hook variations standing and supine exist in all sorts of MA going back forever). That's what I call a pretty weak argument.
You're throwing out challenges now, tsk tsk? Somebody definitely isn't calm here, but it's not me, clearly.
That's two people so far you've DYETB'd. It's not very nice to do that, challenge people for information, etc.