1. Bannasch P, Bloch M, Zerban H (1981) Spongiosis hepatis. Specific changes of the perisinusoidal liver cells induced in rats by AT-nitrosomorpholine. Lab Invest 44: 252–264
2. Frith CH, Ward JM (1980) A morphologic classification of proliferative and neoplastic hepatic lesions in mice. J Environ Pathol Toxicol 3: 329–351