http://uqu.edu.sa/files2/tiny_mce/plugins/filemanager/files/4290567/Engineering%20Analysis%20-%20ch04%20-%20Finite%20Differences,%20Interpolation,%20and%20Numerical%20Differentiation.pdf

http://books.google.com/books?id=32H-iSrZMkgC&pg=PA138&lpg=PA138&dq=Difference+operator+,+Interpolation+,+Extrapolation+,+Numerical+Differentiation&source=bl&ots=qygK20HEVb&sig=PoSCGp5L24Ezsae-KskPxbzVg30&hl=en&sa=X&ei=bUKfUeDcAoGFO-LzgJAB&ved=0CFEQ6AEwBw

http://books.google.com/books?id=fKE68pdJCD4C&pg=PR10&lpg=PR10&dq=Difference+operator+,+Interpolation+,+Extrapolation+,+Numerical+Differentiation&source=bl&ots=nR_uz6vj5-&sig=EfKAPMCRTgQTIiBnwNIUWZ89pYk&hl=en&sa=X&ei=AkWfUY6uFI6sOrnWgJgH&ved=0CFkQ6AEwCDgK#v=onepage&q=Difference%20operator%20%2C%20Interpolation%20%2C%20Extrapolation%20%2C%20Numerical%20Differentiation&f=false

http://www.physics.ohio-state.edu/~ntg/780/readings/hjorth-jensen_notes2011_03.pdf

http://books.google.com/books?id=RrQSJTwpxdMC&pg=PA249&lpg=PA249&dq=problems+for++Interpolation+,+Extrapolation+,+Numerical+Differentiation&source=bl&ots=Qh82YPoanZ&sig=R2yu9UKggLQQZFTMmLKXO835GN0&hl=en&sa=X&ei=oFCfUbmsM8aSO_H-gNgH&ved=0CEcQ6AEwBjgK#v=onepage&q=problems%20for%20%20Interpolation%20%2C%20Extrapolation%20%2C%20Numerical%20Differentiation&f=false

http://www4.ncsu.edu/~mtchu/Teaching/Lectures/MA530/chapter7.pdf

http://www4.ncsu.edu/~mtchu/Teaching/Lectures/MA530/chapter8.pdf

http://my.safaribooksonline.com/book/engineering/9789332515703/4dot-interpolation/ch4_4_xhtml