Appl. Math. Vol.5 No.8, May 20, 2014 DOI:10.4236/am.2014.58124
Appl. Math. Vol.5 No.8, May 15, 2014 DOI:10.4236/am.2014.58120
Appl. Math. Vol.5 No.8, May 15, 2014 DOI:10.4236/am.2014.58123
Appl. Math. Vol.5 No.8, May 15, 2014 DOI:10.4236/am.2014.58122
Appl. Math. Vol.5 No.8, May 15, 2014 DOI:10.4236/am.2014.58121
Appl. Math. [ISSUE], [PUBDATE] DOI:[DOI]