Text in book Gigliotti, Carol. – «The diverse meanings of artificial life». – ISEA97 Chicago : conference proceedings. – Chicago : The School of the Art Institute of Chicago, [1998]. – P. 19-21.
Text in periodical Van de Bogart, Willard. – «Eulogy for culture». – Radical Software. – Vol. 2, no. 1 [(1972)]. – P. 42-43. Also available on the Internet. {{www.radicalsoftware.org}}