Submitted on: 11 January 2017.
Revised on: 21 January 2017.
Accepted on: 13 February 2017.
MANUSCRIPTA MATHEMATICA---SPRINGER HEIDELBERG
Submitted on: 23 March 2020.
Revised on: 03 April 2020.
Accepted on: 10 April 2020.
MANUSCRIPTA MATHEMATICA
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Submitted on: 10 May 2022.
Revised on: 17 June 2022.
Accepted on: 08 July 2022.
MANUSCRIPTA MATHEMATICA---SPRINGER HEIDELBERG
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Submitted on: 18 February 2019.
Revised on: 28 March 2019.
Accepted on: 16 April 2019.
MANUSCRIPTA MATHEMATICA---SPRINGER HEIDELBERG
Submitted on: 20 May 2009.
Revised on: 26 June 2009.
Accepted on: 24 July 2009.
MANUSCRIPTA MATHEMATICA
Submitted on: 25 February 2023.
Revised on: 11 March 2023.
Accepted on: 30 March 2023.
MANUSCRIPTA MATHEMATICA
Submitted on: 06 September 2023.
Revised on: 15 October 2023.
Accepted on: 21 October 2023.
MANUSCRIPTA MATHEMATICA---SPRINGER HEIDELBERG
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