Why some publications are not included in Google Scholar, while some are, for the same conference?
For example, there are a number of papers on Black Hat:
But when you search for them, like "Abusing XSLT for Practical Attacks" on Google Scholar, there is no result. They are papers in 2015, it has been one year since then.
Also, they meet the Google Scholar's inclusion requirement: https://scholar.google.com/intl/en/scholar/inclusion.html
However, for some other papers in the same conference (Black Hat USA 2015), they are included in Google Scholar.
So what are the real standards for publications to be included and searchable in Google Scholar?