Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Brian H. Toby,Rfactors in Rietveld analysis: How good is good enough?,Powder Diffraction,0885-7156,Cambridge University Press (CUP),2006-03,21,1,67-70,https://cir.nii.ac.jp/crid/1360011145577284352,https://doi.org/10.1154/1.2179804