Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) PEARSON JL,Suicide in late life : challenges and opportunities for research. Introduction,Int. Psychogeriatr.,,,1995,7,,131-136,https://cir.nii.ac.jp/crid/1570572701355572352,https://doi.org/10.1017/s104161029500192x