Butula, I. Max Planck Institute for Medical Research, Max Planck Society;
Kuhn, Richard Max Planck Institute for Medical Research, Max Planck Society;
http://onlinelibrary.wiley.com/doi/10.1002/anie.196802081/epdf (Any fulltext)
https://doi.org/10.1002/anie.196802081 (Any fulltext)
Butula, I., & Kuhn, R. (1968). Catalytic hydrogenation of indole. Angewandte Chemie International Edition, 7(3), 208-209. doi:10.1002/anie.196802081.