Leung, Chi Man
Kwok, Yue Kuen
Article History
Received: 14 January 2017
Accepted: 5 February 2018
First Online: 23 February 2018
Change Date: 11 May 2018
Change Type: Correction
Change Details: In the original publication, the copyright holder was incorrectly published as ‘Springer-Verlag Italia S.r.l., part of Springer Nature’ instead of ‘Associazione per la Matematica Applicata alle Scienze Economiche e Sociali (AMASES)’.