ArchiveVolume 8, Issue 1, February 2019
Ali Doumounia, Moumouni Sawadogo, Serge Roland Sanou, François Zougmoré
Pages: 1-4     Published Online: Jan. 24, 2019
DOI: 10.11648/j.ajep.20190801.11        Views 35      Downloads 15
Chunlin Li, Jianqing Chen
Pages: 5-16     Published Online: Jan. 28, 2019
DOI: 10.11648/j.ajep.20190801.12        Views 30      Downloads 14
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