Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
LIN Y. F.,Tychonoff's theorem for the space of multifunctions,Amer. Math. Monthly,,,1967,74,,399-400,https://cir.nii.ac.jp/crid/1571980075576095232,https://doi.org/10.2307/2314568