Submitted on: 20 February 2001.
Revised on: 07 March 2001.
Accepted on: 12 March 2001.
PLANTA
http://reply.papertrans.cn/3/249/24859/24859-12.png
http://reply.papertrans.cn/3/249/24859/24859-13.png
Submitted on: 31 March 2006.
Revised on: 23 April 2006.
Accepted on: 21 May 2006.
PLANTA
Submitted on: 04 September 2003.
Revised on: 17 September 2003.
Accepted on: 29 September 2003.
PLANTA---SPRINGER
Submitted on: 24 October 2003.
Revised on: 20 November 2003.
Accepted on: 06 December 2003.
PLANTA
http://reply.papertrans.cn/3/249/24859/24859-17.png
Submitted on: 25 October 1999.
Revised on: 25 November 1999.
Accepted on: 11 December 1999.
PLANTA---SPRINGER
http://reply.papertrans.cn/3/249/24859/24859-19.png
Submitted on: 16 December 1999.
Revised on: 01 January 2000.
Accepted on: 22 January 2000.
PLANTA---SPRINGER