Experiment
- http://www.mathcs.emory.edu/~cheung/Courses/561/Syllabus/3-C/sparse.html
- http://www.cs.umd.edu/class/fall2002/cmsc214/Tutorial/makefile.html
- http://cs.tau.ac.il/~zwick/papers/sparse.pdf
- http://www.seas.ucla.edu/~vandenbe/103/lectures/flops.pdf (complexity of matrix algorithms)
- http://www.mathworks.com/help/matlab/math/sparse-matrix-operations.html
- http://codereview.stackexchange.com/questions/20124/sparse-matrix-multiplication
- http://facta.junis.ni.ac.rs/mai/mai24/fumi-24_39_51.pdf
- http://radimrehurek.com/gensim/tutorial.html