http://reply.papertrans.cn/1/88/8777/8777-31.png
Submitted on: 25 September 2017.
Revised on: 22 November 2017.
Accepted on: 13 January 2018.
___________________Eptic---UNIV FEDERAL SERGIPE
http://reply.papertrans.cn/1/88/8777/8777-33.png
http://reply.papertrans.cn/1/88/8777/8777-34.png
Submitted on: 09 October 2017.
Revised on: 18 January 2018.
Accepted on: 28 February 2018.
___________________Eptic---UNIV FEDERAL SERGIPE
http://reply.papertrans.cn/1/88/8777/8777-36.png