My company have a 40 sites with different domains that some of their articles appears in my main website with reference to their source.
Our articles write by high level processionals in the field that they write about - we also pay them high salary.
In recent google algorithm change my main site rating down very seriously.
What should we do to restore company main site google rating?
our solution and ideas that not working well:
rel="canonical" to source website (we already have it before google change without results)
meta "original-source" but not have rating influence (we already have it before google change without results)
Edit:: maybe we should delete rel="canonical" from main website articles that refer to our other small websites (because this articles in main website not indexed in google)?
Thanks in advance