Appl. Math. Vol.4 No.11 D, November 29, 2013 DOI:10.4236/am.2013.411A4003
Appl. Math. Vol.4 No.11 D, October 22, 2013 DOI:10.4236/am.2013.411A4002
Appl. Math. Vol.4 No.11 D, October 22, 2013 DOI:10.4236/am.2013.411A4001
Appl. Math. [ISSUE], [PUBDATE] DOI:[DOI]