Hausser, Karl H. Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society;
http://link.springer.com/content/pdf/10.1007%2FBF00601174.pdf (Any fulltext)
https://dx.doi.org/10.1007/BF00601174 (Any fulltext)
Hausser, K. H. (1956). Stickstoff-Radikale bei tiefen Temperaturen I. N-Äthyl-phenazyl. Die Naturwissenschaften, 43(1), 14-15. doi:10.1007/BF00601174.