Relating Chain Conformation to the Density of States and Charge Transport in Conjugated Polymers: The Role of the β-phase in Poly(9,9-dioctylfluorene) - Shi, X; Nádady, V; Perevedentsev, A; Frost, J; Wang, X; von, Hauff E; Mackenzie, R; Nelson, J (Physical Review X, 2019)