http://grigory.us/files/teaching/sublinear-big-data-5-mapreduce.pdf
http://madalgo.au.dk/fileadmin/madalgo/PDF/MapReduce_Algorithms_1.pdf
http://madalgo.au.dk/fileadmin/madalgo/PDF/MapReduce_Algorithms_2.pdf
http://madalgo.au.dk/fileadmin/madalgo/PDF/MapReduce_Algorithms_3.pdf
http://www.cs.rutgers.edu/~muthu/mapreduce_spr11.html
http://www.umiacs.umd.edu/~jimmylin/MapReduce-book-final.pdf