1. Paleoenvironment, algal structures, and fossil algae in the Upper Cambrian of central Texas;Ahr;J. Sediment. Petrol.,1971
2. The carbonate ramp—an alternative to the shelf model;Ahr;Trans., Gulf Coast Assoc. Geol. Soc.,1973
3. Sedimentary and tectonic controls on the development of an early Mississippian carbonate ramp, Sacramento Mountains area, New Mexico;Ahr,1989
4. Facies and origin of Nummulitic buildups: an example from the Giza Pyramids Plateau, (Middle Eocene, Egypt);Aigner;Neues Jahrb. Geol. Paläontol., Abh.,1983
5. Dynamic stratigraphy of epicontinental carbonates, Upper Muschelkalk (M. Triassic), South-German Basin;Aigner;Neues Jahrb. Geol. Paläontol., Abh.,1984