Published: January 27, 2021Received: April 14, 2020Available on J-STAGE: January 27, 2021Accepted: May 20, 2020
Advance online publication: July 10, 2020
Revised: -
SSRR is an Open Access journal distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. Anyone may download, reuse, copy, reprint, or distribute articles published in the journal for not-for-profit purposes if they cite the original authors and source properly. If you remix, transform, or build upon the material, you may not distribute the modified material. https://creativecommons.org/licenses/by-nc-nd/4.0/
