Illinois ? The Southern Illinois University president did not plagiarize parts of his 1984 doctoral dissertation but he should update its academic citations, a school review panel concluded Thursday.

President Glenn Poshard, a former five-term congressman and one-time Democratic candidate for Illinois governor, said he accepted the report and its recommendations. “I take full responsibility for the inadvertent errors that I made 23 years ago,” he said in a statement.

The review panel of members of three key faculty groups at the school concluded that Poshard used a citation style accepted by his dissertation committee at the time, but the style would not be recommended today.

The panel’s report released Thursday recommended Poshard publicly recognize the dissertation’s incomplete citations and correct them using current standards.