Griffiths, W., Catrina, S., Catrina, A., Sirzén, F., Griffiths, W., Bergman, T., . . . Mutt, V. (1999). A cytotoxic, apoptotic, low -molecular weight factor from pineal gland. Life Sciences, 65(10), pp. 1047-1057. doi:10.1016/S0024-3205(99)00335-5

Griffiths, William, S.-B Catrina, A.I Catrina, F. Sirzén, W. Griffiths, T. Bergman, P. Biberfeld, M. Coculescu, and V. Mutt. "A Cytotoxic, Apoptotic, Low -molecular Weight Factor From Pineal Gland." Life Sciences 65, no. 10 (1999): 1047-1057.

Griffiths, William, et al. "A Cytotoxic, Apoptotic, Low -molecular Weight Factor From Pineal Gland." Life Sciences 65.10 (1999): 1047-1057.