Domínguez-Romero, MSc. Allan N., et al. “Micro-Electroanalytical Determination of Potassium in Pharmaceutical and Clinical Samples”. Revista Cubana De Química, vol. 26, no. 2, Nov. 2015, pp. 137-46, https://cubanaquimica.uo.edu.cu/index.php/cq/article/view/300.