Ask BuzzSumo about the content you are looking for. BuzzSumo shall return you with list of most shared articles in chronological sequencing around your topic.

Follow people and groups who share or post articles around your search interest on social media like Twitter, Facebook, LinkedIn. You can later on register with Nuzzle to receive a sorted compilation of articles of your subject in your email periodically.

You can try out some other great tools like Swayy, Feedly, Digg Deeper, Quora, LinkedIn Pulse, Subreddits etc.