Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) HARADA Kosuke and SHINYA Akiyoshi,Fracture toughness value and SEM observations of cracks in almina and zirconium oxide ceramics,THE JOURNAL OF JAPANESE SOCIETY FOR DENTAL MATERIALS AND DEVICES,18844421,The Japanese Society for Dental Materials and Devices,2012,31,4,321-331,https://cir.nii.ac.jp/crid/1390282680314695936,https://doi.org/10.18939/jsdmd.31.4_321