paper

https://drive.google.com/file/d/0Byf0t7DgUfknSUpnU0MyWmNBTEE/view?usp=sharing

https://drive.google.com/file/d/0Byf0t7DgUfknS3luTENVajktU1E/view?usp=sharing

https://drive.google.com/file/d/0Byf0t7DgUfknRTh5c291b19tSFk/view?usp=sharing