Explicit Expanders and the Ramanujan Conjectures - Alexander Lubotzky; Ralph Phillips; Peter Sarnak (STOC, 1986)

Ramanujan graphs. - Alexander Lubotzky; Ralph Phillips; Peter Sarnak (Comb., 1988)

Chebyshev's Bias. - Michael Rubinstein; Peter Sarnak (Exp. Math., 1994)

Integral Apollonian Packings. - Peter Sarnak (Am. Math. Mon., 2011)

Bounded Cutoff Window for the Non-backtracking Random Walk on Ramanujan Graphs. - Evita Nestoridi; Peter Sarnak (Comb., 2023)