Appl. Math. Vol.5 No.12 , June 26, 2014 DOI:10.4236/am.2014.512177
Appl. Math. Vol.5 No.12 , June 26, 2014 DOI:10.4236/am.2014.512176
Appl. Math. Vol.5 No.12 , June 26, 2014 DOI:10.4236/am.2014.512175
Appl. Math. Vol.5 No.12 , June 26, 2014 DOI:10.4236/am.2014.512174
Appl. Math. Vol.5 No.12 , June 26, 2014 DOI:10.4236/am.2014.512173
Appl. Math. [ISSUE], [PUBDATE] DOI:[DOI]