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http://www.newyorker.com/science/mari...affect-math-dunbar-number-friendships
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http://www.huffingtonpost.com/lauren-...06876.html?ncid=fcbklnkushpmg00000063
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http://www.huffingtonpost.fr/natacha-...?ir=France&ncid=fcbklnkfrhpmg00000001
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https://lejournal.cnrs.fr/articles/at...urce=facebook.com&utm_campaign=buffer
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http://www.slate.fr/story/138923/amitie-amour-amis-facebook-internet
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