ArchiveVolume 8, Issue 2, March 2020
Longyang Jia, Wende Shou, Bing Hu
Pages: 19-24     Published Online: May 11, 2020
DOI: 10.11648/j.ajpa.20200802.11        Views 228      Downloads 109
Janusz Wolny, Radoslaw Strzalka
Pages: 25-28     Published Online: Jun. 4, 2020
DOI: 10.11648/j.ajpa.20200802.12        Views 185      Downloads 123
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