http://en.wikipedia.org/wiki/Numerical_methods_for_ordinary_differential_equations
http://www.unf.edu/~mzhan/chapter5.pdf
http://www.atmos.umd.edu/~rjs/class/fall2012/readings/storey_ode_matlab.pdf
http://www.physics.udel.edu/~bnikolic/teaching/phys660/lectures/numerical_ode.pdf
http://www4.ncsu.edu/~mtchu/Teaching/Lectures/MA530/chapter10.pdf
http://reference.wolfram.com/mathematica/tutorial/NumericalSolutionOfDifferentialEquations.html
http://www4.ncsu.edu/~mtchu/Teaching/Lectures/MA530/chapter9.pdf
http://www.ams.org/journals/mcom/1967-21-098/S0025-5718-1967-0225494-5/S0025-5718-1967-0225494-5.pdf
http://onlinelibrary.wiley.com/doi/10.1002/9781118164495.app2/pdf
http://onlinelibrary.wiley.com/doi/10.1002/9781118164495.app1/pdf
http://www.nptel.iitm.ac.in/courses/111107063/module1/lecture1/lecture1.pdf
http://homepages.ulb.ac.be/~dgonze/TEACHING/numerics.pdf
http://www.agu.org/books/sp/057/pdf/057SP09_ch04.pdf
http://www.math.tamu.edu/~phoward/m289/matlabnumericalode.pdf
http://persson.berkeley.edu/128A/ch5.pdf
http://www.cs.cornell.edu/Courses/cs667/2005sp/notes/12budsberg.pdf
http://www.sid.ir/fa/VEWSSID/J_pdf/32713861206.pdf