diff --git a/fel_source_simulation.rst b/fel_source_simulation.rst
index ec5da91..c4ea053 100644
--- a/fel_source_simulation.rst
+++ b/fel_source_simulation.rst
@@ -22,9 +22,9 @@ with authentication (xfel/desy account)
 
 `FEL source web site <https://dcache-door-photon03:2880/XFEL/2014/SIM/>`_
 
-If you use this dataset, please acknowledge [SALDIN99]_.
+If you use this dataset, please acknowledge [NIMA_1999]_.
 
-.. [SALDIN99] E. L. Saldin, E. A. Schneidmiller, and M. V. Yurkov. *Nucl. Instrum. and Methods*, A(429):233, 1999.
+.. [NIMA_1999] E. L. Saldin, E. A. Schneidmiller, and M. V. Yurkov. *Nucl. Instrum. and Methods*, A(429):233, 1999.
 
 
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