Staab, Heinz A. Department of Organic Chemistry, Max Planck Institute for Medical Research, Max Planck Society;
http://www.sciencedirect.com/science/article/pii/S0040403900783572/pdf?md5=0f7a7e1618bafb76e61f32b46846e26d&pid=1-s2.0-S0040403900783572-main.pdf (beliebiger Volltext)
https://doi.org/10.1016/S0040-4039(00)78357-2 (beliebiger Volltext)
Staab, H. A., Döhling, A., Voit, P., & Dernbach, M. (1994). Syntheses of a fourfold-bridged porphyrin-quinone cyclophane and its zinc complex. Tetrahedron Letters, 35(41), 7617-7620. doi:10.1016/S0040-4039(00)78357-2.