https://computing.llnl.gov/tutorials/pthreads/
http://www.yolinux.com/TUTORIALS/LinuxTutorialPosixThreads.html
http://en.wikipedia.org/wiki/POSIX_Threads
http://www.cs.fsu.edu/~baker/realtime/restricted/notes/pthreads.html
http://pt.wikipedia.org/wiki/Thread_(ciência_da_computação)
http://www2.dcc.ufmg.br/disciplinas/aeds3_turmaN/pthreads.pdf
http://homes.dsi.unimi.it/~boccignone/GiuseppeBoccignone_webpage/MatDidatSOD2009_files/pthread-Tutorial.pdf
http://www.csc.villanova.edu/~mdamian/threads/posixthreadslong.html
http://www.dirjournal.com/library/posix-threads.php