@article{hrj:138,
    title      = {On generalised Carmichael numbers.},
    author     = {L Halbeisen and N Hungerbühler},
    url        = {https://hrj.episciences.org/138},
    doi        = {10.46298/hrj.1999.138},
    journal    = {Hardy-Ramanujan Journal},
    issn       = {2804-7370},
    volume     = {Volume 22 - 1999},
    eid        = 1,
    year       = {1999},
    month      = {Jan},
    keywords   = {square-free numbers, Fermat congruence, Korselt's criterion, generalised Carmichael numbers, [MATH]Mathematics [math]},
    language   = {English},
}