This issue has been available online since September for the regular issue of September 2018. All articles in this issue were authored/co-authored by 11 authors from 1 country (Indonesia)

This issue has been available online since June for the regular issue of June 2018. All articles in this issue were authored/co-authored by 13 authors from 1 country (Indonesia)

This issue has been available online since December for the regular issue of March 2018. All articles in this issue were authored/co-authored by 6 authors from 1 country (Indonesia)

This issue has been available online since June for the regular issue of June 2017. All articles in this issue were authored/co-authored by 7 authors from 1 country (Indonesia)

This issue has been available online since December for the regular issue of March 2017. All articles in this issue were authored/co-authored by 6 authors from 1 country (Indonesia)

This issue has been available online since September for the regular issue of September 2016. All articles in this issue were authored/co-authored by 6 authors from 1 country (Indonesia)

This issue has been available online since June for the regular issue of June 2016. All articles in this issue were authored/co-authored by 7 authors from 1 country (Indonesia)

This issue has been available online since December for the regular issue of March 2017. All articles in this issue were authored/co-authored by 6 authors from 1 country (Indonesia)