Submitted on: 25 November 2010.
Revised on: 19 February 2011.
Accepted on: 14 April 2011.
___________________Journal of Elliptic and Parabolic Equations
http://reply.papertrans.cn/2/166/16524/16524-32.png
http://reply.papertrans.cn/2/166/16524/16524-33.png
Submitted on: 19 December 1999.
Revised on: 02 April 2000.
Accepted on: 01 June 2000.
___________________Journal of Elliptic and Parabolic Equations
http://reply.papertrans.cn/2/166/16524/16524-35.png
Submitted on: 05 July 2015.
Revised on: 02 September 2015.
Accepted on: 23 October 2015.
___________________Journal of Elliptic and Parabolic Equations