Davydov, Alexander A. http://orcid.org/0000-0002-5827-4560
Marcugini, Stefano http://orcid.org/0000-0002-7961-0260
Pambianco, Fernanda http://orcid.org/0000-0001-5476-5365
Funding for this research was provided by:
Italian National Group for Algebraic and Geometric Structures and their Applications ((GNSAGA – INDAM), (GNSAGA – INDAM))
University of Perugia (Project “Strutture Geometriche, Combinatoria e loro Applicazioni”, Base Research Fund 2017, Projects “Strutture Geometriche, Combinatoria e loro Applicazioni”, Base Research Fund 2017)
Russian Government (Contract No 14.W03.31.0019)
Article History
Received: 31 August 2018
Revised: 26 May 2019
Accepted: 28 May 2019
First Online: 10 June 2019