Updates are available Erratum dated 2021-10-11

Article History

Received: 3 June 2015

Accepted: 23 February 2016

First Online: 9 March 2016

Change Date: 11 October 2021

Change Type: Erratum

Change Details: An Erratum to this paper has been published:

Change Details: https://doi.org/10.1140/epjc/s10052-021-09699-0