Submitted on: 12 September 2020.
Revised on: 25 December 2020.
Accepted on: 23 February 2021.
___________________ANNALS OF REGIONAL SCIENCE---SPRINGER
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Submitted on: 15 February 2022.
Revised on: 30 May 2022.
Accepted on: 16 July 2022.
___________________ANNALS OF REGIONAL SCIENCE---SPRINGER
Submitted on: 28 February 2008.
Revised on: 19 May 2008.
Accepted on: 08 June 2008.
___________________ANNALS OF REGIONAL SCIENCE---SPRINGER
Submitted on: 29 December 2000.
Revised on: 26 January 2001.
Accepted on: 27 March 2001.
___________________ANNALS OF REGIONAL SCIENCE---SPRINGER
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Submitted on: 25 February 2010.
Revised on: 18 May 2010.
Accepted on: 23 June 2010.
___________________ANNALS OF REGIONAL SCIENCE---SPRINGER
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Submitted on: 01 February 2017.
Revised on: 15 March 2017.
Accepted on: 25 March 2017.
___________________ANNALS OF REGIONAL SCIENCE---SPRINGER