Locke, Andrew J.; Richards, Christopher J.; Hibbs, David E.; Hursthouse, Michael B. (October 1997). "Synthesis and X-ray crystal structure analysis of a scalemic C2-symmetric ferrocenophane". Tetrahedron: Asymmetry. 8 (20): 3383–3386. doi:10.1016/S0957-4166(97)00466-7.