Upon cross-examination, an expert witness may be questioned concerning statements contained in a published treatise, periodical or pamphlet on a subject of history, medicine or other science or art if the treatise, periodical or pamphlet is established as a reliable authority. A treatise, periodical or pamphlet may be established as a reliable authority by the testimony or admission of the witness, by other expert testimony or by judicial notice. Statements contained in a treatise, periodical or pamphlet established as a reliable authority may be used for purposes of impeachment but may not be introduced as substantive evidence. [1999 c.85 §2]
Oregon Legal Code