The forms in "In Ratchik's Shop" (1967-68) and In "Memory of the Good Fellows of the Beginning of the Century" (1969) are based on the Russian constructivists' search, in the 1920s, for the two-dimensional and three-dimensional form. In this search Aroch discerns the possibility of creating a form that would be both primary and unique. His own search in Form (1974) is to be understood in the context of his emotional and intellectual identification with those artists' search. (Yona Fischer, Catalogue: "Itineraries and Forms")