Primitive divisors of sequences associated to elliptic curves with complex multiplication
M. Verzobio, Research in Number Theory 7 (2021).

A density of ramified primes
S. Chan, C. McMeekin, D. Milovic, Research in Number Theory 8 (2021).

Modular invariants for genus 3 hyperelliptic curves
S. Ionica, P. Klçer, K. Lauter, E. Lorenzo García, M.-A. Manzateanu, M. Massierer, C. Vincent, Research in Number Theory 5 (2019).