http://reply.papertrans.cn/1/88/8777/8777-21.png
Submitted on: 23 July 2018.
Revised on: 14 August 2018.
Accepted on: 08 October 2018.
___________________Eptic---UNIV FEDERAL SERGIPE
http://reply.papertrans.cn/1/88/8777/8777-23.png
Submitted on: 03 June 2000.
Revised on: 01 July 2000.
Accepted on: 20 August 2000.
___________________Eptic---UNIV FEDERAL SERGIPE
http://reply.papertrans.cn/1/88/8777/8777-25.png
Submitted on: 27 December 2008.
Revised on: 15 March 2009.
Accepted on: 13 May 2009.
___________________Eptic---UNIV FEDERAL SERGIPE
http://reply.papertrans.cn/1/88/8777/8777-27.png
Submitted on: 26 March 2019.
Revised on: 06 May 2019.
Accepted on: 26 June 2019.
___________________Eptic---UNIV FEDERAL SERGIPE
http://reply.papertrans.cn/1/88/8777/8777-29.png
Submitted on: 27 November 2015.
Revised on: 13 February 2016.
Accepted on: 26 March 2016.
___________________Eptic---UNIV FEDERAL SERGIPE