Porto, S. M., C. Arcidiacono, U. Anguzza, A. Giummarra, and G. Cascone. “An Automatic System for the Detection of Dairy Cows Lying Behaviour in Free-Stall Barns”. Journal of Agricultural Engineering, vol. 44, no. s2, Sept. 2013, doi:10.4081/jae.2013.273.