Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
T. Skettrup,Urbach's rule derived from thermal fluctuations in the band-gap energy,Physical Review B,0163-1829,American Physical Society (APS),1978-09-15,18,6,2622-2631,https://cir.nii.ac.jp/crid/1363951795814907008,https://doi.org/10.1103/physrevb.18.2622