@Article{Wos94-AAR-26,
    Author       = "Wos, L.",
    Year         = "1994",
    Title        = "{Challenge in Group Theory}",
    Journal      = "AAR Newsletter",
    Volume       = "26",
    Pages        = "3-5",
    Comment      = "TPTPRef"
}

@Article{Wos94-AAR-27,
    Author       = "Wos, L.",
    Year         = "1994",
    Title        = "{Two Challenge Problems}",
    Journal      = "AAR Newsletter",
    Volume       = "27",
    Pages        = "9",
    Comment      = "TPTPRef"
}