1975. Press Cutting. The Times. Exhibitions review by Paul Overy. Ref. Edinburgh Arts 1975 exhibition.
1981. R-L: Halpern, Panza, Hall, MacAllister, with New Beginnings are in the Offing/ The Poorhouse Doors by Joseph Beuys at the Scottish National Gallery of Modern Art.
1973. Letter to Demarco from gallery director Ronald Feldman (New York) , ref. Beuys and contact with East European artists.
1976. Press Cutting. The Times. Review by Irving Wardle of The Dead Class by Kantor's Cricot 2 Theatre.
1975. Exhibition Catalogue. Page 17/45. Aspects '75 (contemporary Yugoslavian art). Nikola Gvozdenovic.
1970. Letter (page 2/2) from Demarco to Willi Fleischer, Cultural Officer of the City of Dusseldorf. Ref. Strategy: Get Arts.