1. Buonocore, M.G.: The Challenge of Bonding to Dentin, Proc Int Symp Acid Etch Tech, St. Paul: North Central Publishing Co. , 1975, pp 139-150.
2. Bowen, R.L.: Development of an Adhesive Restorative Material, in Adhesive Restorative Dental Materials II, University of Virginia Workshop, Public Health Service Publication No. 1494, Washington, D.C.: U. S. Government Printing Office, 1966, pp 225-231.