P. Corradini, C. De Rosa, A. Panunzi, G. Petrucci, and P. Pinot, “The Structure of Poly(1-oxo-2-phenyltrimethylene): A Crystalline Alternating Styrene-Carbon Monoxide Copolymer”, Chimia, vol. 44, no. 3, p. 52, Mar. 1990, doi: 10.2533/chimia.1990.52.