The alphabet and the algorithm / Autor Mario Carpo . Cambridge (Massachusetts) : MIT Press Cambridge, Massachusetts, London, England, 2011 . xi, 169 s . http://site.ebrary.com/lib/natl/Doc?id=10453040. http://www.nkp.cz/katalogy-a-databaze/licencovane-databaze/prehled-licencovanych-zdroju/ebrary-vypujcky . [1, currently available 1]