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http://www.facstaff.bucknell.edu/mastascu/elessonsHTML/Logic/Logic2.html http://users.ece.gatech.edu/~sudha/academic/class/ece2030/Lectures/simplifying/examples.html http://books.google.com.pk/books?id=FLgMygrZDgEC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false http://www.scribd.com/doc/23554907/Microelectronic-circuits-5th-edition-Sedra-Smith-Solution-Manual