Gelmanas, Arūnas, Tomas Bukauskas, Andrius Macas, Giedrė Žarskienė, and Ainius Žarskus. 2012. “Postoperative Cognitive Dysfunction in Geriatric Patients After Orthopedic Surgery”. Acta Medica Lituanica 19 (3): 108-14. https://doi.org/10.6001/actamedica.v19i3.2431.