Bloch-modes-in-periodic-waveguides.md

@@ -18,12 +18,12 @@ To run the model, open `rhombus.pro` with Gmsh.
 ## Additional information
 
 The model automatically computes the photonic crystal fibre band diagram of
-[Figure 3.16, p. 152 from the textbook Foundations Of Photonic Crystal
-Fibres](http://books.google.com/books?id=iVZXwXDswv0C&lpg=PP1&dq=isbn%3A1860945074&pg=PA152#v=onepage&q&f=false),
-by F. Zolla et al.
-
-You can double-click on any point in the band diagram to interactively visualize
-the corresponding eigenmode, even while the calculation is running.
+[Figure 3.16,
+p. 152](http://books.google.com/books?id=iVZXwXDswv0C&lpg=PP1&dq=isbn%3A1860945074&pg=PA152#v=onepage&q&f=false)
+from the textbook Foundations Of Photonic Crystal Fibres [1], using a finite
+element formulation with Floquet-Bloch conditions [2]. You can double-click on
+any point in the diagram to visualize the corresponding eigenmode, even while
+the calculation is running.
 
 ## References