The role of OH− ions in the stabilization of F2+ colour centres in LiFV. M. Khulugurov, V. N. Salomatov, I. M. Kalogeras, A. Vassilikou-Dova and I. ChristakisEur. Phys. J. B, 28 1 (2002) 91-101DOI: https://doi.org/10.1140/epjb/e2002-00204-0