Mertens, Michael H. Max Planck Institute for Mathematics, Max Planck Society;
https://doi.org/10.1353/ajm.2021.0029 (Publisher version)
arXiv_1702.03516.pdf (Preprint), 536KB
Duncan, J. F. R., Mertens, M. H., & Ono, K. (2021). O'Nan moonshine and arithmetic. American Journal of Mathematics, 143(4), 1115-1159. doi:10.1353/ajm.2021.0029.