Andy published his work on the synthesis of poly(phenylene methylene)s in Polymer Chemistry.
Read it now: external page Journal of Polymer Science Part A: Polymer Chemistry
A. Braendle, P. Schwendimann, M. Niederberger, W. Caseri, Synthesis and Fractionation of Poly(Phenylene Methylene), J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 309.