1. Sopra un rarissimo caso di gravidanza gemellare con un feto papiraceo e con inserzione velamentosa del funicolo del feto vivo;Ottolenghi-Preti;Ann Ostet Ginecol Med Perinat,1972
2. Brain damage in survivor after in utero death of monozygous co-twin;Melnick;Lancet,1977
3. Twin placenta in perinatal mortality;Benirschke;NY State J Med,1961
4. Analysis of etiologic factors in cerebral palsy with severe mental retardation;Durkin;Eur J Pediatr,1976
5. Multicystic encephalomalacia in liveborn twin with a stillborn macerated co-twin;Yoshioka;J Pediatr,1979