Articles regarding our studies with feral pigs and outdoor raised swine 

• University of California Cooperative Extension Wild Pig Survey: UCCE Livestock and Range Topics
• Connection: Vet Med Cooperative Extension (Winter 2020) 
• A preliminary spatial study to understand the distribution of feral pigs and outdoor-raised pigs in California: Laura Patterson, Jaber A. Belkhiria, Beatriz Martinez-Lopez, and Alda F. Pires