Article's Authors sideloading via Help Center API

Hi,

We are watching for ability to search Articles by Help Center API with Author sideloading. We use sideloading for ticket's search API and I hoped that Help Center API has same, but looking this page https://developer.zendesk.com/api-reference/help_center/help-center-api/search looks like it hasn't. So, am I correct? There is no way to do this? 

Thank you in advance.