Video document : Monography Biorn, Per. – Minu-Phone, Proxima Centauri, Piece #70, Filmore East. – [2004]. – VHS.
Text in periodical Biorn, Per. – «Description of "Minuphone"». – E.A.T. News. – Vol.1, no. 2 (June 1, 1967). – P. 18.