DOI : http://dx.doi.org/10.46889/JDR.2020.1101
DOI : http://dx.doi.org/10.46889/JDR.2020.1102
DOI : http://dx.doi.org/10.46889/JDR.2020.1103
DOI : http://dx.doi.org/10.46889/JDR.2020.1104
DOI : http://dx.doi.org/10.46889/JDR.2020.1105