Bolduc, S., L. Lacombe, A. Naud, M. Grégoire, Y. Fradet, and R. R. Tremblay. “Urinary PSA: a Potential Useful Marker When Serum PSA Is Between 2.5 ng/mL and 10 ng/ML”. Canadian Urological Association Journal, vol. 1, no. 4, Mar. 2013, pp. 377-81, doi:10.5489/cuaj.444.