Article Processing Charges to provide free access to readers and to cover the costs of peer review management, journal production, online hosting, and long-term archiving. This APC is valid for the current calendar year and may be changed at any time at the sole discretion of the publisher. The submitting author is responsible for payment of the APC and must confirm, at the time of submission, that s/he will organize payment of the APC, should the article be accepted for publication. This responsibility may not be delegated to any third party unless agreed to by the publisher. Note: APC will be billed after the article "Accepted" and will not affect the peer review process.

Article Processing Charges: IDR 300.000

A waiver or partial waiver will be available for paper submission of authors from a minimum of three countries, or invited authors decided by the editor in case of lack of funding, excessive length of the submitted manuscript, or other reasonable reasons provided by the author during the submission. The author should declare that he asks for a waiver in the comments in the editor's box during their submission. A waiver will most likely be denied if it is not requested at this stage. The waiver will not affect the review result.