It depends. If you read a number of books on a particular topic you'll notice the same themes coming up again and again. It clearly isn't plagiarism to write about the same topic (you can also reference your sources if you want).
If you are truly "re-writing" the articles, you should be fine. If you're just changing one or two words then this, obviously, isn't. I would advise you to read the article you are looking to reproduce, take from it everything you can, then go away and write it using this knowledge without looking at it again. This will ensure it is written in a completely different style. Don't worry if you forget something, you can go back and fact-check once the article is written.