Pal, Subhajit, and Andreas F. M. Kilbinger. “New Phosphine Reagents for the Living Polymerization of Aminobenzoic Acids and Its Oligomers: Polymer and Colloid Highlights”.
CHIMIA, vol. 75, no. 9, Sept. 2021, p. 803,
https://doi.org/10.2533/chimia.2021.803.