1. Adams, M. J. (1990). Learning to read: Thinking and learning about print. Cambridge, MA: MIT Press.
2. Bakwin, H. (1973). Reading disability in twins. Developmental Medicine and Child Neurology, 15, 184–187.
3. Bates, T. C., Castles, A., Coltheart, M., Gillespie, N., Wright, M., & Martin, N. G. (2004). Behaviour genetics analyses of reading and spelling: A component processes approach. Australian Journal of Psychology, 56(2), 115–126.
4. Bates, T. C., Castles, A., Luciano, M., Wright, M. J., Coltheart, M., & Martin, N. G. (2007). Genetic and environmental bases of reading and spelling: A unified genetic dual route model. Reading and Writting, 20(1–2), 147–171.
5. Briggs, C., & Elkind, D. (1977). Characteristics of early readers. Perceptual and Motor Skills, 44, 1231–1237.