column
2020, 38(6): 723-729.
DOI: 10.11913/PSJ.2095-0837.2020.60723
2020, 38(6): 730-732.
DOI: 10.11913/PSJ.2095-0837.2020.60730
2020, 38(6): 773-785.
DOI: 10.11913/PSJ.2095-0837.2020.60773
2020, 38(6): 786-794.
DOI: 10.11913/PSJ.2095-0837.2020.60786
2020, 38(6): 820-830.
DOI: 10.11913/PSJ.2095-0837.2020.60820
2020, 38(6): 839-843.
DOI: 10.11913/PSJ.2095-0837.2020.60839
2020, 38(6): 844-852.
DOI: 10.11913/PSJ.2095-0837.2020.60844
2020, 38(6): 853-861.
DOI: 10.11913/PSJ.2095-0837.2020.60853