Bulinski, Kamil, Alina Ostafe, and Igor Shparlinski. 2025. “Counting Embeddings of Free Groups into $\mathrm{SL}_2(\mathbb{Z})$ and Its Subgroups”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 26 (4):2351-62. https://doi.org/10.2422/2036-2145.202307_011.