Coba jelasin Literatur dari Fritz Glarner dong

Werner Haftmann. Painting in the Twentieth Century. 2 vols. Praeger, New York, 1965. Page 341 and plate 389, fig. 971.

Margit Staber. Fritz Glarner: Monograph on One of the Leading Exponents of Concrete Art. ABC Verlag, Zurich 1976.

New York, NY, The Metropolitan Museum of Art, Heilbrunn Timeline of Art History, http://www.metmuseum.org/toah/hi/hi_glarnerfritz.htm .