Funding for this research was provided by:
Kementerian Riset Teknologi Dan Pendidikan Tinggi Republik Indonesia (027/RPL/INSINAS-2/VII/2018, 047/P/RPL-LIPI/INSINAS-1/II/2019)
Text and Data Mining valid from 2019-09-04
Received: 20 March 2019
Accepted: 27 May 2019
First Online: 4 September 2019
Ethics approval and consent to participate
: The authors declare that this study does not involve human subjects, human material, and human data.This manuscript is an original article and has not published in other journals. The authors agree to comply with the copyright rule.
: The authors agreed to the publication of the manuscript in this journal. The authors grant the accessibility of the scientific article in agreement of the springer policy.
: The authors declare that they have no competing interests.