Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
"Katayama, Shin-ichi",On Some Formulas for π/2,"Journal of mathematics, the University of Tokushima",13467387,The University of Tokushima,2008-12,42,,13-17,https://cir.nii.ac.jp/crid/1050304183900696064,