On c = 1 critical phases in anisotropic spin-1 chainsC. Degli Esposti Boschi, E. Ercolessi, F. Ortolani and M. RoncagliaEur. Phys. J. B, 35 4 (2003) 465-473DOI: https://doi.org/10.1140/epjb/e2003-00299-7