@misc{indiciae802c3edc2008,
  title = {Method and apparatus for evaluating multilayer objects for imperfections},
  author = {Heyman, Joseph S. and Abedin, Nurul and Sun, Kuen J.},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/20080004817},
  note = {Source identifier: 20080004817}
}