1) Ellis, R. W. B. and van Creveld, S.: A syndrome characterized by ectodermal dysplasia, polydactyly, chondro-dysplasia and congenital morbus cordis. Arch. Dis. Child., 15: 65-84, 1940.
2) Gorlin, R. J., et al.: Syndrome of the Head and Neck, 3 ed., Oxford University P ess, New York, 1990, p 201-204.