@article{oai:soai.repo.nii.ac.jp:00000941,
 author = {Shibaoka, Yoshio},
 journal = {相愛大学研究論集, The Annual Report of Researches of Sōai University},
 month = {Mar},
 pages = {63--66},
 title = {On a Sum of one Double Series},
 volume = {4},
 year = {1988}
}