1. Method for identify toys or other articles intended for use in children under 3 years of age which present choking aspiration, or ingestion hazards;Federal Register Notice,1979
2. A Study to determine the size of toy/toy parts which caused suffocation;Frezza,1977
3. Banning of Toys and Other Childrens Articles Presenting Choking, Aspiration, and/ or Ingestion Hazards due to small parts: 38;Federal Register Notice;CFR,1973
4. Human Factor Analysis-Choking incidents in children;Deppa;CPSC,1983
5. Human Factor Analysis-Choking incidents in children;Deppa;CPSC,1983