Kardelen, Fırat, et al. “Sinus Node Dysfunction in Children and Adolescents: Treatment by Implantation of a Permanent Pacemaker in 26 Patients”. The Turkish Journal of Pediatrics, vol. 44, no. 4, Oct. 2002, pp. 312-6, https://doi.org/10.24953/turkjpediatr.2002.2994.