A A Ladan ; E I Nwobodo ; K A Tunau... http://www.njmonline.org/article.asp?issn=1115-2613;year=2017;volume=26;issue=1;spage=5;epage=10;aulast=Ladan;type=0.
,
2017
A U Kaoje ; U Mohammed ; A Abdulkarim... http://www.jfsmonline.com/article.asp?issn=2349-5014;year=2016;volume=2;issue=2;spage=78;epage=84;aulast=Kaoje.
,
2016