@Article{Bar92,
    Author       = "Barker-Plummer, D",
    Year         = "1992",
    Title        = "{Gazing: An Approach to the Problem of Definition and
                    Lemma Use}",
    Journal      = "Journal of Automated Reasoning",
    Volume       = "8",
    Number       = "3",
    Pages        = "311-344",
    Comment      = "TPTPRef"
}