著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) PAVEL V. GAPEEV,PRICING OF PERPETUAL AMERICAN OPTIONS IN A MODEL WITH PARTIAL INFORMATION,International Journal of Theoretical and Applied Finance,0219-0249,World Scientific Pub Co Pte Ltd,2012-02,15,01,1250010,https://cir.nii.ac.jp/crid/1361137046407122048,https://doi.org/10.1142/s0219024911006450