Preferably, use a perforating wheel to cut,
but in lack of such, you can cut along lines with a scalpel,
taking care to not cut all the way to the edge.
Exhibition catalogue / artist's book for show held September 27 - November 3, 1974. Texts by Michael Oppitz, Barbara Reise, Jost Herbig, and Armin Zweite, includes an interview with the artist by Irmeline Lebeer. Chronology, bibliography, and artist's exhibition history. Text in German, Flemish, French, and English. Rare-ish...