Index: /qipapers.bib
===================================================================
--- /qipapers.bib	(revision 771)
+++ /qipapers.bib	(revision 772)
@@ -22776,2 +22776,9 @@
   author = {Grussmayer, K.S. and Kurz, A. and Herten, D.-P.}
 }
+@article{Hafi2014,
+  year = {2014},
+  title = {Fluorescence nanoscopy by polarization modulation and polarization angle narrowing},
+  note = {doi:10.1038/nmeth.2919},
+  journal = {Nature Methods},
+  author = {Hafi, N. and Grunwald, M. and Heuvel, L.S. van den and Aspelmeier, T. and Chen, J.-H. and Zagrebelsky, M. and {Sch\"utte}, O.M. and Steinem, C. and Korte, M. and Munk, A. and Walla, P.J.}
+}