Three Sided Football is a game invented by Asger Jorn, that he presents in the book "The Application of the Triolectical Method in General Situology", edited in Århus in 1964 by the Scandinavian Institute for Comparative Vandalism. Here is a tutorial video, shot by Pied la Biche, about the rules of Three Sided Football : http://vimeo.com/12509689