Submitted on: 28 July 2020.
Revised on: 14 August 2020.
Accepted on: 06 September 2020.
NULL
Submitted on: 07 June 2016.
Revised on: 06 July 2016.
Accepted on: 16 July 2016.
NULL
Submitted on: 12 July 2007.
Revised on: 24 July 2007.
Accepted on: 13 August 2007.
Tangence---PRESSES UNIV QUEBEC
http://reply.papertrans.cn/3/292/29168/29168-24.png
http://reply.papertrans.cn/3/292/29168/29168-25.png
http://reply.papertrans.cn/3/292/29168/29168-26.png
http://reply.papertrans.cn/3/292/29168/29168-27.png
Submitted on: 19 December 2010.
Revised on: 01 January 2011.
Accepted on: 14 January 2011.
Tangence---PRESSES UNIV QUEBEC
Submitted on: 21 May 2003.
Revised on: 30 June 2003.
Accepted on: 11 July 2003.
NULL
Submitted on: 08 February 1999.
Revised on: 16 March 1999.
Accepted on: 22 March 1999.
NULL