http://reply.papertrans.cn/2/109/10887/10887-31.png
Submitted on: 03 June 2016.
Revised on: 04 July 2016.
Accepted on: 07 August 2016.
___________________GOLD BULLETIN---SPRINGER HEIDELBERG
Submitted on: 14 October 2017.
Revised on: 23 December 2017.
Accepted on: 06 January 2018.
___________________GOLD BULLETIN---SPRINGER HEIDELBERG
http://reply.papertrans.cn/2/109/10887/10887-34.png
http://reply.papertrans.cn/2/109/10887/10887-35.png
Submitted on: 28 October 2019.
Revised on: 31 December 2019.
Accepted on: 19 February 2020.
___________________GOLD BULLETIN---SPRINGER HEIDELBERG