Are you sure you want to leave Paper?
Continue to https://ac.els-cdn.com/S0094119085710340/1-s2.0-S0094119085710340-main.pdf?_tid=1129468a-a408-11e7-904b-00000aab0f6c&acdnat=1506574201_cf9fdca3668386c7ff87fd9f227c2ba9
Please turn on JavaScript to use Paper in all of its awesomeness. ^_^