No matter how knowledgeable you are about a topic, you would still need to research information about it especially when you're writing an article. I cannot remember a time when I didn't even research for an article. Usually, before I write an article, I have multiple tabs open regarding it. This way, information is easier to get from these sources and I can also add them up at the end of the article.
Do you do this as well when you're writing an article?