Coexistence of incommensurate magnetism and superconductivity in Fe_{1+y}Se_xTe_{1-x} by Khasanov, R, Bendele, M, Amato, A, Babkevich, P, Boothroyd, A, Cervellino, A, Conder, K, Gvasaliya, SN, Keller, H, Klauss, H, Luetkens, H, Pomjakushina, E, Roessli, B