farshad bajoghli, p maleki, و r mehrvarzan, “To Determine and Compare the Average Amounts of Resistance of Four Features of Preparation on First Mandibular Molar Full Metal Crowns”, مجله دانشکده دندانپزشکی اصفهان, ج 2, ش 1, صص 7-13, فوریه 2007.