L. B. Lemos and H. S. de Figueiredo Júnior, “SIDE EFFECTS OF OPIOID DRUGS ON THE CENTRAL NERVOUS SYSTEM IN CANCER PATIENTS: LITERATURE REVIEW”, REASE, vol. 8, no. 4, pp. 929–939, Apr. 2022, doi: 10.51891/rease.v8i4.4990.