Nielsen, J., Bøtner, A., Bille-Hansen, V., Oleksiewicz, M., & Storgaard, T. (2002). Experimental inoculation of late term pregnant sows with a field isolate of porcine reproductive and respiratory syndrome vaccine-derived virus. Vet Microbiol.

Nielsen, J., A. Bøtner, V. Bille-Hansen, M.B Oleksiewicz, und T. Storgaard. "Experimental Inoculation of Late Term Pregnant Sows With a Field Isolate of Porcine Reproductive and Respiratory Syndrome Vaccine-derived Virus." Vet Microbiol 2002.

Nielsen, J., et al. "Experimental Inoculation of Late Term Pregnant Sows With a Field Isolate of Porcine Reproductive and Respiratory Syndrome Vaccine-derived Virus." Vet Microbiol 2002.