L. S. Bollen, M. T. Fox, G. Stodulski, and J. Hau, “Echinostoma caprom’ infection in non-pregnant female BALB/c and Swiss T.O. mice: effect on feed intake, liveweight, and serum pregnancy-associated murine protein-l and corticosterone”, Scand J Lab Anim Sci, vol. 23, no. 1, Dec. 1996.