Siregar, Parlindungan. “Plasma Sodium in Relation With the Extracellular Fluid Volume in Chronic Hemodialysis Patients”. Acta Medica Indonesiana 46, no. 4 (October 1, 2014). Accessed December 23, 2025. http://actamedindones.org/index.php/ijim/article/view/106.