Have you written this article by yourself? Have you taken inspiration from anywhere and then written it in your words?
I have written the article myself, the inspiration is from the Robert C. Martin (Uncle Bob) who came up with many software design principles and Michael Feathers who gave this set of principles the name SOLID.
NOTE:
Did you read the instructions in the README?
Have you read the instructions in CONTRIBUTING?
Have you written this article by yourself? Have you taken inspiration from anywhere and then written it in your words?