@article{oai:tus.repo.nii.ac.jp:00002187,
 author = {小倉, 金之助 and Ogura, Kinnosuke},
 issue = {3,4},
 journal = {東北数學雜誌, Tohoku Mathematical Journal, First Series},
 month = {},
 pages = {246--260},
 title = {On the Sign and Magnitude of the Coefficients in the Fourier Series, the Sine Series and the Cosine Series},
 volume = {15},
 year = {1919},
 yomi = {オグラ, キンノスケ}
}