Panzardi, A., Mellagi, A. P. G., Bierhals, T., Gheller, N. B., Bernardi, M. L., Bortolozzo, F. P., & Wentz, I. (2012). Weight gain of pregnant sows associated with their behavior in pens and to the uniformity of piglets. Pesquisa Agropecuaria Brasileira, 46(11), 1562–1569. https://doi.org/10.1590/S1678-3921.pab2011.v46.9946