@Article{BHS00,
    Author       = "Balsiger, P. and Heuerding, A. and Schwendimann, S.",
    Year         = "2000",
    Title        = "{A Benchmark Method for the Propositional Modal Logics
                    K, KT, S4}",
    Journal      = "Journal of Automated Reasoning",
    Volume       = "24",
    Number       = "3",
    Pages        = "297-317",
    Comment      = "TPTPRef,TPTPCite,Evaluation"
}