Source: https://fac.umc.edu.dz/ista/pdf/cours/Chapitre3%20Alg%C3%A8bre%20de%20Boole%20%203%C3%A8me%20s%C3%A9ance%20Mardi%2008_12_20%20PMI%20et%20TS%20S1%20.pdf