Nonlocal string orders and entanglement spectrum in the spin-1/2 alternating Heisenberg-Ising chainGuang-Hua Liu, Wei Li, Gang Su and Guang-Shan TianEur. Phys. J. B, 87 5 (2014) 105DOI: https://doi.org/10.1140/epjb/e2014-50150-1