The electronic structure and elastic properties of Ca doped Ti2Ni alloy Fangfang Wu, Huanming Chen, Jinyu Qiao, Yi Hou, Ruyang Yan and Zekun Yang Eur. Phys. J. B, 96 7 (2023) 93 Published online: 09 July 2023 DOI: 10.1140/epjb/s10051-023-00551-w