Leblebicioğlu, Gürsel, et al. “Variable Expressivity of Congenital Longitudinal Radial Deficiency and Spinal Dysraphism in Monozygotic Twins”. The Turkish Journal of Pediatrics, vol. 47, no. 4, Oct. 2005, pp. 390-2, https://turkjpediatr.org/article/view/2753.