A. A. Öpik

• Cymbric Vale fauna of New South Wales and early Cambrian biostratigraphy
• Dolichometopid trilobites of Queensland, Northern Territory, and New South Wales
• Ordian (Cambrian) Crustacea Bradoriida of Australia
• Redlichia of the Ordian (Cambrian) of Northern Australia and New South Wales
• The Mindyallan fauna of north-western Queensland