R. A. Funk, D. U. Thomson, B. J. White, D. G. Renter, and R. L. Rust, “Effects of ear-notch sample handling on reliability of antigen-capture enzyme-linked immunosorbent assay testing for bovine viral diarrhea virus”., Bov. pract., vol. 42, no. 1, pp. 45–49, Feb. 2008.