Gray, Marion, Centeno, Jose A., Slaney, David P., Ejnik, John W., Todorov, Todor, and Nacey, John N. (2005) Environmental exposure to trace elements and prostate cancer in three New Zealand ethnic groups. International Journal of Environmental Research and Public Health, 2 (3). pp. 374-384.

Gray, Marion A., Crampton, Peter, Weinstein, Philip, and Nacey, John (2004) Differences in prostate disease symptoms and visits to the general practitioner among three ethnic groups in New Zealand. B J U International, 94 (1). pp. 96-100.

Gray, MarionA., Delahunt, Brett, Fowles, Jefferson R. , Wienstine, Philip, Cooke, Russell R., and Nacey, John N. (2004) Demographic and clinical factors as determinants of serum levels of prostate specific antigen and its derivatives. Anticancer Research, 24 (3). pp. 2069-2072.

Grey, Marion A., Delahunt, Brett, Fowles, Jefferson R., Weinstein, Philip, Cooke, Russell R., and Nacey, John N. (2003) Assessment of ethnic variation in serum levels of total, complexed and free prostate specific antigen. Comparison of Maori, Pacific Island and New Zealand European populations. Pathology, 35 (6). pp. 480-483.

Williams, Paora N., Gray, Marion A., Ka'ai, Tania M., Moorfield, John C., Mcpherson , Kathryn M., Weinstein, Philip, and Nacey, John (2003) Maori men’s perception and experiences of health seeking for prostate health problems in New Zealand. Pacific Health Dialog, 10 (2). pp. 71-78.