Valiensi, Stella Maris, et al. “Nocturnal Polysomnbnographic Characteristics and Other Related Variables in Elderly Patients”. Revista del Hospital Italiano de Buenos Aires, vol. 37, no. 2, Mar. 2017, pp. 52-56, https://doi.org/10.51987/Rev.Hosp.Ital.B.Aires.v37i2.619.