5 articles
Using Aria Landmarks
ARIA hidden element must not contain focusable elementsKeeping focus for keyboard users when using ARIA hidden.
Certain ARIA roles must contain particular children
Resolving ARIA roles - Parent and Children IssuesHiding Semantics with role=presentation
YouTube Embeds Causing Flag for "Elements must only use permitted ARIA attributes."An explanation of the flag on embedded YouTube videos; "Elements must only use permitted ARIA attributes".