[ 1 ] D. Miner, A. Shook, MapReduce design patterns: building effective algorithms and analytics for Hadoop and other systems, O’Reilly, ISBN: 978-1-449-32717-0
[ 2 ] http://database.cs.brown.edu/projects/mapreduce-vs-dbms/
[ 3 ] http://michaelnielsen.org/blog/write-your-first-mapreduce-program-in-20-minutes/
[ 4 ] http://code.google.com/p/hadoop-map-reduce-examples/
[ 5 ] http://ayende.com/blog/4435/map-reduce-a-visual-explanation
[ 6 ] Looking for help on line?: http://stackoverflow.com/questions/7074842/hadoop-mapreduce-programming