Text in book Clark Little, David. – «Composing with chaos : applications of a new science for music». – Actes : 6e symposium des arts électroniques = Proceedings : 6th international symposium on electronic art. – Montréal : ISEA : Inter-Société des arts électroniques, [1995]. – P. 165-171.
Text in periodical Castro-Cid, Enrique. – «Brief space note». – Radical Software. – Vol. 2, no. 5 ([1973]). – P. 20-22. Also available on the Internet. {{www.radicalsoftware.org}}