Propagation effects at low frequencies seen in the LOFAR long-term monitoring of the periodically active FRB 20180916B. - Gopinath, A; Bassa, C G; Pleunis, Z; Hessels, J W T; Chawla, P; Keane, E F; Kondratiev, V; Michilli, D; Nimmo, K (Monthly Notices of the Royal Astronomical Society, 2024)