Text and Data Mining valid from 2019-06-21
First Online: 21 June 2019
Compliance with ethical standards
: The authors would like to thank Mr. Louay Rabah Dahi for his help in checking the numerical results. Also, author B acknowledges partial funding from Spanish-plus-FEDER and MINECO project moveON TIN2014-57341-R, TIN2016-81766-REDT and TIN2017-88213-R. Author A declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.