Structural and electronic properties of MX3 (M = Ti, Zr and Hf; X = S, Se, Te) from first principles calculationsMahmud Abdulsalam and Daniel P. JoubertEur. Phys. J. B, 88 7 (2015) 177DOI: https://doi.org/10.1140/epjb/e2015-60005-x