Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Takuma Akimoto and Eli Barkai and Günter Radons,Infinite invariant density in a semi-Markov process with continuous state variables,Physical Review E,2470-0045,American Physical Society (APS),2020-05-12,101,5,052112,https://cir.nii.ac.jp/crid/1360853567459538432,https://doi.org/10.1103/physreve.101.052112