@article{10_4153_S0008414X18000044,
     author = {B\"achle, Andreas and Kimmerle, Wolfgang and Serrano, Mariano},
     title = {On the {First} {Zassenhaus} {Conjecture} and {Direct} {Products}},
     journal = {Canadian journal of mathematics},
     pages = {602--624},
     year = {2020},
     volume = {72},
     number = {3},
     doi = {10.4153/S0008414X18000044},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008414X18000044/}
}