1948. - 1984.
Vojin Kovač – Chubby (1949, Ptuj – 1985, Ljubljana), worked with OHO as an author of literary works, visual and concrete poetry; and collaborated on happenings and films. His walk along the streets of Ljubljana in his pyjamas was one of the first happenings in Slovenia. His "Manifest of the Cultural Revolution", published in the newspaper Tribuna, met with a wide popular response.