@book{ BA14168088, author = "Sih, G. C. (George C.) and Gdoutos, E. E.", title = "Mechanics and physics of energy density : characterization of material/structure behavior with and without damage", publisher = "Kluwer Academic Publishers", year = "1992", series = "Engineering application of fracture mechanics", number = "9", URL = "https://ci.nii.ac.jp/ncid/BA14168088" }