Low-energy magnetic excitations in double-layered manganite T. Chatterji, P. Thalmeier, G. J. McIntyre, R. van de Kamp R. Suryanarayanan, G. Dhalenne and A. RevcolevschiEurophys. Lett., 46 6 (1999) 801-807DOI: https://doi.org/10.1209/epl/i1999-00335-x
