I’d like to know if it’s possibe to share article from the other site, if I state who the author of the article is, or if I provide a link of the site which I found the article from.
I have read somewhere then it’s not considered to be as an infringement of copyright.
Even if you mention who wrote it, it can still be copyright violation. It all depends on the type of copyright they use.
You will most likely have to ask for permission from the author before posting the lesson here on LingQ.