Copycat: How Facebook Tried to Squash Snapchat // https://www.wired.com/story/copycat-how-facebook-tried-to-squash-snapchat/
Clone Wars: Why Instagram Will Legally Get Away With Copying Snapchat Stories // https://www.fastcompany.com/3062593/clone-wars-why-instagram-will-legally-get-away-with-copying-snapchat-stories
Instagram on copying Snapchat: “This is the way the tech industry works” // https://techcrunch.com/2017/05/16/to-clone-or-not-to-clone/