Quintão e Silva, M. da G., Silva, A.V.M. and Costa, H.M. de A. (1996) “Dictyocaulus arnfieldi (Cobbold, 1884): comparative analysis of the occurrence in horses, mules and donkeys”, Brazilian Journal of Veterinary Research and Animal Science, 33(4), pp. 223–225. doi:10.11606/issn.2318-3659.v33i4p223-225.