Index: /qipapers.bib
===================================================================
--- /qipapers.bib	(revision 790)
+++ /qipapers.bib	(revision 791)
@@ -22911,2 +22911,12 @@
   author = {{Sch\"onle}, A. and Middendorff, C. von and Ringemann, C. and Hell, S.W. and Eggeling, C.}
 }
+@article{Donnert2007,
+  number = {1},
+  year = {2007},
+  title = {Major signal increase in fluorescence microscopy
+through dark-state relaxation},
+  pages = {81-86},
+  journal = {Nature Methods},
+  volume = {4},
+  author = {Donnert, G. and Eggeling, C. and Hell, S.W.}
+}