Kuhn, Richard Max Planck Institute for Medical Research, Max Planck Society;
Kainer, Helmuth Max Planck Institute for Medical Research, Max Planck Society;
http://onlinelibrary.wiley.com/doi/10.1002/jlac.19525780129/epdf (Any fulltext)
https://dx.doi.org/10.1002/jlac.19525780129 (Any fulltext)
Kuhn, R., & Kainer, H. (1952). Ringerweiterung am Tetraphenyl‐pyrrol. Liebigs Annalen der Chemie, 578(1), 226-227. doi:10.1002/jlac.19525780129.