Spin gap state in α'-NaV2O5 studied by far infrared spectroscopy D. Smirnov, J. Leotin, O. Drachenko, P. Millet, J. Jegoudez et A. RevcolevschiJ. Phys. IV France, 09 PR10 (1999) Pr10-279-Pr10-280DOI: https://doi.org/10.1051/jp4:19991073
