Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
NAKAMURA Shin-ichi,Uniqueness for an inverse hyperbolic problem,Japanese journal of mathematics. New series,02892316,The Mathematical Society of Japan,1996,22,2,257-261,https://cir.nii.ac.jp/crid/1390001205257235200,https://doi.org/10.4099/math1924.22.257