Ovates were common in Britain especially during OIS 11 (Hoxnian).
The significance of morphological variation in Acheulean bifaces has been a central issue in Paleolithic research for over a century.
Observations on Settlement and Subsistence during the Late La Jolla Complex - Preceramic Interface as Evidenced at Site CA-SDI-11,796, Lower San Diego River Valley, San Diego County, California [SCA Proceedings - PDF].
Recovery, Synthesis, and Reporting: 1990s Anza-Borrego Desert State Park Cultural Resources Inventory Conducted by the Archaeological Research Unit, University of California, Riverside [California State Parks].
Lerner and Joseph Chartkoff Review of "Archaeological Investigations at the Breakfast Canyon Rockshelters, Death Valley National Monument, Inyo County, California: Shoshone Food Storage and Horticulture in the Southwestern Great Basin," by Robert M. Explaining Prehistoric Variation in the Abundance of Large Prey: A Zooarchaeological Analysis of Deer and Rabbit Hunting along the Pecho Coast of Central California. The Coleville and Bodie Hills NRCS Soil Inventory, Walker and Bridgeport, California: A Reevaluation of the Bodie Hills Obsidian Source (CA-MNO-4527) and Its Spatial and Chronological Use. Review of "Rock Camp Site: Archaeological Excavation of an Indian Campsite near Lake Arrowhead, San Bernardino Mountains," by Ruth Dee Simpson, Gerald A. Fredrickson; and "Archaeological Investigations on Pilot Ridge, Six Rivers National Forest," "Archaeological Investigations on South Fork Mountain, Six Rivers and Shasta-Trinity National Forests," and "Archaeological Investigations on Pilot Ridge: Results of the 1984 Field Season," by William R.