1. Monie IW. Genesis of single umbilical artery. Am J Obstet Gynecol. 1970; 108:400–405.
2. Bryan EM, Kohler HG. The missing umbilical artery. I. Prospective study based on a maternity unit. Arch Dis Child. 1974; 49:844–852.
3. Byrne J, Blanc WA. Malformations and chromosome anomalies in spontaneously aborted fetuses with single umbilical artery. Am J Obstet Gynecol. 1985; 151:340–342.
4. Scalercio F, Ferraro M, Mastrantonio P, Scalercio A. Single umbilical artery (SUA) and congenital eye abnormalities: 2 case reports. Minerva Pediatr. 1998; 50:141–144.
5. Choi KS, Han YK, Park SH, Shin HH. Ophthalmic examinations in premature infants at 3 years of age. J Korean Ophthalmol Soc. 2000; 41:965–972.
6. Noda S, Hayasaka S, Setogawa T. Epiblepharon with inverted eyelashes in Japanese children. I. Incidence and symptoms. Br J Ophthalmol. 1989; 73:126–127.