Chapter 2.1.13 of the OIE Terrestrial Manual (Rabies) :
http://www.oie.int/fileadmin/Home/eng/Health_standards/tahm/2.01.13_RABIES.pdf
CDC Protocol for Postmortem Diagnosis of Rabies in Animals by Direct
Fluorescent Antibody Testing
http://www.cdc.gov/rabies/pdf/rabiesdfaspv2.pdf
Rupprecht and Nagarjan (2014). Current Laboratory Techniques in Rabies Diagnosis, Research and Prevention, Volume 1, 1st Edition ; Elsevier
store.elsevier.com/Current-Laboratory-Techniques-in-Rabies-Diagnosis-Research-and-Prevention-Volume-1/isbn-9780128000144/
Laboratory techniques in rabies, 4th edition
Meslin et al. (1996)