https://collaborate.princeton.edu/en/publications/expanders-sorting-in-rounds-and-superconcentrators-of-limited-dep/
EXPANDERS, SORTING IN ROUNDS AND SUPERCONCENTRATORS OF LIMITED DEPTH. - Princeton University
expanderssortingrounds
https://collaborate.princeton.edu/en/publications/smaller-explicit-superconcentrators-2/fingerprints/?sortBy=alphabetically
Smaller explicit superconcentrators - Fingerprint - Princeton University
smallerexplicitfingerprintprincetonuniversity