@article{10_4153_S0008439520000375,
     author = {Pollack, Paul},
     title = {The {Number} of {Non-cyclic} {Sylow} {Subgroups} of the {Multiplicative} {Group} {Modulo} n},
     journal = {Canadian mathematical bulletin},
     pages = {204--215},
     year = {2021},
     volume = {64},
     number = {1},
     doi = {10.4153/S0008439520000375},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439520000375/}
}