Antoñanzas, F.
Juárez-Castelló, C. A.
Rodríguez-Ibeas, R.
Funding for this research was provided by:
University of La Rioja (REGI18/23)
MINECO (ECO2016-78685-R)
Article History
Received: 20 December 2018
Accepted: 6 October 2019
First Online: 29 October 2019
Ethics approval and consent to participate
: The ethical approval is not needed as the article deals with the development of a mathematical analytical model. The same applies to the consent to participate as there is neither a human enrolment in the research nor an empirical work.
: We the three authors consent the publication of this work.
: The authors declare that they have no competing interests.