Nonlocal defect solitons in parity-time-symmetric superlattices with defocusing nonlinearityLimin Fang, Jie Gao, Zhiwei Shi, Xing Zhu and Huagang LiEur. Phys. J. D, 68 10 (2014) 298DOI: https://doi.org/10.1140/epjd/e2014-50266-4