Diao, Y. (2023). Density of the union of positive diagonal binary quadratic forms. Acta Arithmetica. Instytut Matematyczny.https://doi.org/10.4064/aa210830-24-11 

Verzobio, M. (2021). Primitive divisors of elliptic divisibility sequences for elliptic curves with j=1728. Acta Arithmetica. Institute of Mathematics, Polish Academy of Sciences.https://doi.org/10.4064/aa191016-30-7