Twinning and Cerebral Palsy:Experience in Four Northern California Counties, Births 1983 Through 1985Pediatrics 92:854-858, Grether,J.K.,et al, 1993
Twinning and Neurologic MorbisityAm J Dis Child 146:1110-1113, Scheller,J.M.&Nelson,K.B., 1992