Stabilities, aromaticity, infrared spectra, and optical properties of exohedral fullerene derivatives C76X18(X = H, F, Cl, and Br)Chunmei Tang, Shengwei Chen, Weihua Zhu, Aimei Zhang, Kaixiao Zhang and Mingyi LiuEur. Phys. J. D, 68 2 (2014) 19DOI: https://doi.org/10.1140/epjd/e2013-40220-5