Cat Flu: Explains the signs, complications, treatment, and prognosis, as well as an outline of the occurrence in different breeds.
Colds In Cats And Kittens: Describes the symptoms and warns which of them indicate serious disease. Includes information about the two most common causes.
Feline Upper Respiratory Tract Disease - Cat Flu: Description of the primary causes of the condition, symptoms to look for, diagnosis, treatment, how infection occurs, prevention and control measures.
The University of Glasgow: Cat Flu: FAQ for owners on symptoms, prevention, and the two principle causes, feline calicivirus and herpesvirus.