Twinning and Neurologic MorbisityAm J Dis Child 146:1110-1113, Scheller,J.M.&Nelson,K.B., 1992
Fetal & Newborn Virus InfectionsJ Pediatr 77:315, Overall,J.,et al, 1970
The Cornelia de Lange SyndromeJ Pediatr 63:1000-1020, Ptacek,L.J., 1963