Christian Krattenthaler, Thomas W. Müller. Z)PSL2(Z) modulo prime powers. Journal of Combinatorial Theory, Series A, 120(8):2039-2063, 2013. [doi]
@article{KrattenthalerM13,
title = {Z)PSL2(Z) modulo prime powers},
author = {Christian Krattenthaler and Thomas W. Müller},
year = {2013},
doi = {10.1016/j.jcta.2013.08.002},
url = {http://dx.doi.org/10.1016/j.jcta.2013.08.002},
researchr = {https://researchr.org/publication/KrattenthalerM13},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {120},
number = {8},
pages = {2039-2063},
}