Pfau, T., Jennings, C., Mitchell, H., Olsen, E., Walker, A. M., Egenvall, A., …Rhodin, M. (2016). Lungeing on hard and soft surfaces: Movement symmetry of trotting horses considered sound by their owners. EQUINE VETERINARY JOURNAL, 48(1), 83-89. https://doi.org/10.1111/evj.12374