Dunkel, I. J.; Bussel, J. B. AJDC - American Journal of Diseases of Children (1993)
Krauss, A. N.; Fatica, N.; Lewis, B. S.; Cooper, R.; Thaler, H. T.; Cirrincione, C.; O'Loughlin, J.; Levin, A.; Engle, M. A.; Auld, P. A. M. AJDC - American Journal of Diseases of Children (1989)
Steinherz, L. J.; Brochstein, J. A.; Robins, J. AJDC - American Journal of Diseases of Children (1986)