Papers

https://drive.google.com/open?id=0Bzz6TsGO39xHUTR3WUtEaFJWVVE
https://drive.google.com/open?id=0Bzz6TsGO39xHNmJoQWJNWFFVTE0
https://drive.google.com/open?id=0Bzz6TsGO39xHX19pd3NBd0NFd2M