This issue was available online in December 2022. All articles in this issue (11 original research articles) were authored/co-authored by 28 authors from 3 countries (Indonesia, Switzerland, and India).

This issue has been available online since 10 th June 2021 for the regular issue of June 2021. All articles in this issue (7 original research articles) were authored/co-authored by 20 authors from 13 affiliations and 5 countries (Indonesia, China, Australia, United States, Macao).

This issue has been available online since 15th September 2020 for the regular issue of December 2020. All articles in this issue (5 original research articles) were authored/co-authored by 8 authors from 5 affiliations and 2 countries (Indonesia and China). 

This issue has been available online since 20th June 2020 for the regular issue of June 2020. All articles in this issue (5 original research articles) were authored/co-authored by 9 authors from 6 affiliations and 2 countries (Indonesia and China).

This issue has been available online since 30th November 2019 for the regular issue of December 2019. All articles in this issue (6 original research articles) were authored/co-authored by 13 authors from 8 affiliations and 3 countries (Indonesia, India, and China).

This issue has been available online since 1st June 2019 for the regular issue of June 2019. All articles in this issue (5 original research articles) were authored/co-authored by 6 authors from 5 affiliations and 2 countries (Indonesia and Pakistan).