No, that is not only not "established", it is not even true. The only thing that is "taken" from zerocoin is the vague concept of converting between btc and another coin type. How it is done and what the other coin type is and how it works, including the minting process itself, is totally different.

Just look in the SDC whitepaper man, there is no footnote that cites zerocoin with reference to any of the cryptography whatsoever, only with the general concept of converting from btc to another token. That is the only connection. If you think that by itself is a big deal then sure go ahead and keep bringing it up like the other SDC pumpers do. You (and they) probably will regardless.