http://www.chups.jussieu.fr/polys/ophtalmo/POLY.Chp.11.html
http://www.em-consulte.com/en/article/664825
http://onlinelibrary.wiley.com/doi/10.1002/14651858.CD008732.pub2/full
http://onlinelibrary.wiley.com/doi/10.1002/14651858.CD007325.pub3/full
http://onlinelibrary.wiley.com/doi/10.1002/14651858.CD009510.pub2/abstract
https://medicine.uiowa.edu/eye/patient-care/clinics/ocular-vascular-clinic/central-retinal-vein-occlusion
https://www.moorfields.nhs.uk/condition/retinal-vein-occlusion & https://www.rcophth.ac.uk/wp-content/uploads/2015/07/Retinal-Vein-Occlusion-RVO-Guidelines-July-2015.pdf
https://www.nice.org.uk/guidance/conditions-and-diseases/eye-conditions/macular-oedema-and-retinal-vein-occlusion