<pre>
@article{NSR1989KR16,
  author="H. -D. {Kronfeldt} and G. {Sinn}",
  title="Cross-Second-Order Effects of the Isotope Shift in the Er II Groundconfiguration 4f$^{12}$6s",
  journal="Z.Phys.",
  year=1989,
  volume="D14",
  pages="205"
}</pre>


<pre>
*****                                                                  *****
*  Note: Translation from NSR format to bibTex is imperfect. Entries       *
*    may require editing before use. This is especially true for           *
*    "secondary" sources such as conference proceedings, lab reports, etc. *
*****                                                                  *****
</pre>