Submitted on: 08 August 2001.
Revised on: 02 December 2001.
Accepted on: 15 December 2001.
___________________Curved and Layered Structures---DE GRUYTER POLAND SP Z O O
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Submitted on: 22 July 2001.
Revised on: 18 November 2001.
Accepted on: 18 December 2001.
___________________Curved and Layered Structures---DE GRUYTER POLAND SP Z O O
Submitted on: 28 March 2004.
Revised on: 09 May 2004.
Accepted on: 20 May 2004.
___________________Curved and Layered Structures---DE GRUYTER POLAND SP Z O O