@article{SJL_1963-1964___2_68_0,
     author = {Yosida, K\^osaku},
     title = {Holomorphic semi-groups},
     journal = {S\'eminaire sur les \'equations aux d\'eriv\'ees partielles},
     pages = {68--75},
     year = {1963-1964},
     publisher = {Coll\`ege de France},
     number = {2},
     language = {en},
     url = {https://www.numdam.org/item/SJL_1963-1964___2_68_0/}
}