Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) DI CRESCENZO A. and Giorno V. and Nobile A.G. and Ricciardi L.M.,On first-passage-time and transition densities for strongly symmetric diffusion processes,Nagoya Math. J.,00277630,Nagoya University,1997,145,,143-161,https://cir.nii.ac.jp/crid/1571980076703799552,