Ferreira, M.C.; Sousa-Ferreira, T.; Almeida, N.; Santos, B. (2015). "Can We Still Talk About Chronic Hallucinatory Psychosis? a Case Report". European Psychiatry. 30: 1689. doi:10.1016/S0924-9338(15)31295-5. S2CID147500729.
Ferreira, M.C.; Sousa-Ferreira, T.; Almeida, N.; Santos, B. (2015). "Can We Still Talk About Chronic Hallucinatory Psychosis? a Case Report". European Psychiatry. 30: 1689. doi:10.1016/S0924-9338(15)31295-5. S2CID147500729.