Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) E. Osawa and M. Fujita and M. Yoshida and T. Umeda,Morphology and electronic structure of graphitic sponges,Synthetic Metals,0379-6779,Elsevier BV,1994-01-01,71,,1897-1898,https://cir.nii.ac.jp/crid/1870302167655453568,https://doi.org/10.1016/0379-6779(94)03097-p