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Submitted on: 01 November 2006.
Revised on: 11 February 2007.
Accepted on: 01 April 2007.
___________________Global Social Welfare---SPRINGER INT PUBL AG
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Submitted on: 08 March 2010.
Revised on: 27 May 2010.
Accepted on: 29 June 2010.
___________________Global Social Welfare---SPRINGER INT PUBL AG
Submitted on: 28 March 2020.
Revised on: 15 July 2020.
Accepted on: 28 August 2020.
___________________Global Social Welfare---SPRINGER INT PUBL AG
Submitted on: 28 June 2021.
Revised on: 18 July 2021.
Accepted on: 03 September 2021.
___________________Global Social Welfare---SPRINGER INT PUBL AG
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