Darden, B. J. The contextual uses of the present perfect in the primary chronicle: Bill J. Darden. O RUS! : Studia litteraria slavica in honorem Hugh McLean.(1995).

Darden, Bill J. "The Contextual Uses of the Present Perfect in the Primary Chronicle: Bill J. Darden." O RUS! : Studia Litteraria Slavica in Honorem Hugh McLean.(1995) .

Darden, Bill J. "The Contextual Uses of the Present Perfect in the Primary Chronicle: Bill J. Darden." O RUS! : Studia Litteraria Slavica in Honorem Hugh McLean.(1995), .