Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KITAOKA Seiichiro and KIMURA Nobuo,"On the Examination of the Condition of Fatigue Crack Propagating Threshold Using Slip-Initiation Phenomena : 1st Report, Behavior of Crack Opening or Closing and Crack Opening Stress",TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A,03875008,The Japan Society of Mechanical Engineers,1980,46,403,258-265,https://cir.nii.ac.jp/crid/1390282679454061824,https://doi.org/10.1299/kikaia.46.258