1 files changed, 11 insertions, 0 deletions
diff --git a/bibliography.bib b/bibliography.bib
index 321cd88..d194c74 100644
--- a/bibliography.bib
+++ b/bibliography.bib
@@ -5977,3 +5977,14 @@ doi = {10.1364/OPEX.12.005448}
   url = {http://link.aps.org/doi/10.1103/PhysRevLett.105.153601}
 }
 
+@article{allen1992PRAoam,
+  title={Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes},
+  author={Allen, Les and Beijersbergen, Marco W and Spreeuw, RJC and Woerdman, JP},
+  journal={Physical Review A},
+  volume={45},
+  number={11},
+  pages={8185},
+  year={1992},
+  publisher={APS}
+}
+