D. J. Holtkamp, et al., “Assessment of the Economic Impact of Porcine Reproductive and Respiratory Syndrome Virus on United States Pork Producers,” Journal of Swine Health and Production, Vol. 21, No. 2, 2013, pp. 72-84.
 Y. Li, et al., “Emergence of a Highly Pathogenic Porcine Reproductive and Respiratory Syndrome Virus in the Mid-Eastern Region of China,” The Veterinary Journal, Vol. 174, No. 3, 2007, pp. 577-584. doi:10.1016/j.tvjl.2007.07.032
 S. Dee, H. Joo, B. Park, T. Molitor and G. Bruna, “Attempted Elimination of Porcine Reproductive and Respiratory Syndrome Virus from a Seedstock Farm by Vaccination of the Breeding Herd and Nursery Depopulation,” Veterinary Record, Vol. 142, No. 21, 1998, pp. 569-572. doi:10.1136/vr.142.21.569
 S. Dee, M. Bierk, J. Deen and T. Molitor, “An Evaluation of Test and Removal for the Elimination of Porcine Reproductive and Respiratory Syndrome Virus from Five Swine Farms,” Canadian Journal of Veterinary Research, Vol. 63, No. 1, 2001, pp. 22-27.
 T. Gillespie and A. Carroll, “Methods of Control and Elimination of Porcine Reproductive and Respiratory Syndrome Virus Using Modified Live Vaccine in a Two-Site Production System,” Journal of Swine Health and Production, Vol. 11, No. 6, 2003, pp. 291-295.
 C. A. Corzo, E. Mondaca, S. Wayne, M. Torremorell, S. Dee, P. Davies and R. B. Morrison, “Control and Elimination of Porcine Reproductive and Respiratory Syndrome Virus,” Virus Research, Vol. 154, No. 1-2, 2010, pp. 185-192. doi:10.1016/j.virusres.2010.08.016
 D. J. Holtkamp, et al., “Terminology for Classifying Swine Herds by Porcine Reproductive and Respiratory Syndrome Virus Status,” Journal of Swine Health and Production, Vol. 19, No. 1, 2011, pp. 44-56.
 R. A. Rockar, K. S. Drobatz and F. S. Shofer, “Development of a Scoring System for the Veterinary Trauma Patient,” Journal of Veterinary Emergency and Critical Care, Vol. 4, No. 2, 1994, pp. 77-83. doi:10.1111/j.1476-4431.1994.tb00118.x
 L. Meier, S. van de Geer and P. Buhlmann, “The Group Lasso for Logistic Regression,” Journal of the Royal Statistical Society: Series B, Vol. 70, 2008, pp. 53-71. doi:10.1111/j.1467-9868.2007.00627.x
 E. Barranger, et al., “An Axilla Scoring System to Predict Non-Sentinel Lymph Node Status in Breast Cancer Patients with Sentinel Lymph Node Involvement,” Breast Cancer Research and Treatment, Vol. 91, No. 2, 2005, pp. 113-119. doi:10.1007/s10549-004-5781-z
 H. Lin, C. Wang, P. Liu and D. J. Holtkamp, “Construction of Disease Risk Scoring Systems Using Logistic Group Lasso: Application to Porcine Reproductive and Respiratory Syndrome Survey Data,” Journal of Applied Statistics, Vol. 40, No. 4, pp. 736-746.
 J. J. Zimmerman, et al., “Porcine Reproductive and Respiratory Virus (Porcine Aterivirus),” In: J. J. Zimmerman, L. A. Karriker, A. Ramirez, K. J. Schwartz and G. W. Stevenson, Eds., Diseases of Swine, 10th Edition, Wiley-Blackwell, Hoboken, 2012, pp. 461-486.