@article{SJL_1963-1964___2_68_0,
     author = {Yosida, K\^osaku},
     title = {Holomorphic semi-groups},
     journal = {S\'eminaire Jean Leray},
     pages = {68--75},
     publisher = {Coll\`ege de France},
     number = {2},
     year = {1963-1964},
     language = {en},
     url = {http://archive.numdam.org/item/SJL_1963-1964___2_68_0/}
}