Electronic structure of DyRhSn and HoRhSn compounds: band calculations and optical study Yury V. Knyazev, Alexey V. Lukoyanov, Yury I. Kuz’min, Sachin Gupta and K.G. Suresh Eur. Phys. J. B, 92 6 (2019) 128 Published online: 12 June 2019 DOI: 10.1140/epjb/e2019-100096-y