Assadi, Ziba
Salehi, Saeed http://orcid.org/0000-0001-6961-5749
Funding for this research was provided by:
School of Mathematics, Institute for Research in Fundamental Sciences (90030053)
Article History
First Online: 5 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.