Appl. Math. Vol.4 No.9, September 25, 2013 DOI:10.4236/am.2013.49183
Appl. Math. Vol.4 No.9, September 20, 2013 DOI:10.4236/am.2013.49182
Appl. Math. Vol.4 No.9, September 20, 2013 DOI:10.4236/am.2013.49181
Appl. Math. Vol.4 No.9, September 20, 2013 DOI:10.4236/am.2013.49180
Appl. Math. Vol.4 No.9, September 20, 2013 DOI:10.4236/am.2013.49179
Appl. Math. [ISSUE], [PUBDATE] DOI:[DOI]