There are still many studies based on the concept, here from a recent one. http://www.sciencedirect.com/science/article/pii/S1053810016301222 …pic.twitter.com/MEas0VCYeQ
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There are still many studies based on the concept, here from a recent one. http://www.sciencedirect.com/science/article/pii/S1053810016301222 …pic.twitter.com/MEas0VCYeQ