Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hasegawa Kazuhiro,Present and Future Requirments for Materials in Spine Surgery,Materia Japan,13402625,The Japan Institute of Metals and Materials,2014,53,4,134-138,https://cir.nii.ac.jp/crid/1390001204080862592,https://doi.org/10.2320/materia.53.134