M. R. Elzes, I. Mertens, O. Sedlacek, B. Verbraeken, A. C. A. Doensen, M. A. Mees, M. Glassner, S. Jana, J. M. J. Paulusse, and R. Hoogenboom. Linear Poly(ethylenimine-propylenimine) Random Copolymers for Gene Delivery: From Polymer Synthesis to Efficient Transfection with High Serum Tolerance. Biomacromolecules, volume 23, issue 6, 2022.