Tian, Qiang, Guanyun Yan, Liangfei Bai, Xinxi Li, Lin Zou, László Rosta, András Wacha, et al. 2018. “Phase Mixing And Separation In Polyester Polyurethane Studied By Small-Angle Scattering: A Polydisperse Hard Sphere Model Analysis”. Polymer 147: 1-7. doi:https://doi.org/10.1016/j.polymer.2018.05.069.