Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SASAKI Kazuro and YAMAKADO Norio and SIOHARA Zen-iti,Indentation of Bit into Rock by Dynamic and Static Force,Journal of the Mining and Metallurgical Institute of Japan,03694194,The Mining and Materials Processing Institute of Japan,1958,74,846,989-995,https://cir.nii.ac.jp/crid/1390001205981471616,https://doi.org/10.2473/shigentosozai1953.74.846_989