CASTELLS, Manuel. The rise of the network society. Oxford : Blackwell Publishers, 2000. (2nd ed.) Dostupné online.ISBN 0631221409. S. 403-406.
MCLUHAN, Marshall. Understanding media : the extensions of man. Cambridge, Mass. : [s.n.]. (First MIT Press edition, 1994.) Dostupné online.ISBN 0262631598. S. 7-23.