1. Jaszczak RJ United States Patent No. 4,499,375 1985
2. Data Spectrum Corporation http://www.spect.com/pub/Flangeless_Jasczack_Phantoms.pdf
3. American College of Radiology https://ACR.org/Clinical-Resources/Accreditation
4. Intersocietal Accreditation Commission https://www.intersocietal.org/nuclear