Adiputra, Ristiyanto http://orcid.org/0000-0003-3630-9432
Utsunomiya, Tomoaki
Koto, Jaswar
Yasunaga, Takeshi
Ikegami, Yasuyuki
Funding for this research was provided by:
Indonesia Endowment Fund for Education (PRJ-873 /LPDP.3/2017)
Article History
Received: 19 December 2018
Accepted: 9 February 2019
First Online: 19 February 2019