1
by Adrian
Published 2006
2
by Gould
Published 2009
3
by Jeffrey
Published 2008
4
by Gradshteyn
Published 2007
5
by Hatch
Published 2005
6
Published 2006
7
Published 2007
8
by Arora
Published 1995
9
Published 2009
10
by SIMPSON
Published 2002
11
Published 2001
12
by POLYA
Published 1957
13
by STEWART
Published 1997
14
by Clapham
Published 2005
15
16
by Devlin
Published 2012
17
by Ferland
Published 2009
18
by Ogden
Published 2005
19
Published 2010
20
by Johnson
Published 2007