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    Cell cycle control and plant morphogenesis: is there an essential link?
    with Adriana S. Hemerly, Marc Van Montagu, and Dirk Inzé
    Bioessays 21 (1): 29-37. 1999.
  • Um Problema a Respeito de Subst'ncia e Relativo em Aristóteles
    with Christopher Shields
    Cadernos de História E Filosofia da Ciência 13 (2). 2003.
    If form qualifies as substance, as it is claimed in Metaphysics, then we seem to have a problem: a form appears to be a relative, while evidently no relative is a substance. At any rate, Aristotle had held in the Categories that no primary substance could be a relative; so, if it turns out that form in the Metaphysics is primary substance, then either Aristotle has contradicted himself or else he has revised his categorial ontology to the point where he no longer maintains even that x's being a …Read more