Allan and Ellis, 2000, Porcine circoviruses: a review, J Vet Invest, 12(1), 3-14

Bryson, 1999, Update on Calf Pneumonia, CPD Vet Med 1(3) pp 90-94, Rila publications.

Bryson et al, 1999, Calf vaccines, Vet Rec 145,33-39

Carter, Chengappa and Roberts (The virologist absent from 4th ed) Essentials of Veterinary Microbiology, Vth ed, SectionV on respiratory infections by species

Current index of veterinary specialities (IVS) for details of vaccines, (I checked to find no intranasal feline vaccines now listed)