http://reply.papertrans.cn/4/303/30248/30248-21.png
Submitted on: 07 October 2022.
Revised on: 22 October 2022.
Accepted on: 09 November 2022.
Utilitas
http://reply.papertrans.cn/4/303/30248/30248-23.png
http://reply.papertrans.cn/4/303/30248/30248-24.png
http://reply.papertrans.cn/4/303/30248/30248-25.png
Submitted on: 27 June 1999.
Revised on: 14 July 1999.
Accepted on: 21 July 1999.
Utilitas---CAMBRIDGE UNIV PRESS
Submitted on: 28 April 2022.
Revised on: 05 June 2022.
Accepted on: 26 June 2022.
Utilitas
http://reply.papertrans.cn/4/303/30248/30248-28.png
http://reply.papertrans.cn/4/303/30248/30248-29.png
Submitted on: 26 June 2001.
Revised on: 04 August 2001.
Accepted on: 22 August 2001.
Utilitas