“Indigestible cellulose and lignin in determining feces production and apparent digestibility in horses - doi: 10.4025/actascianimsci.v34i3.10577”, Acta Sci. Anim. Sci., vol. 34, nº 3, p. 267–272, fev. 2012, doi: 10.4025/actascianimsci.v34i3.10577.