@phdthesis{THESE_1933__149__1_0,
     author = {Tsortsis, Anastase},
     title = {Sur l{\textquoteright}int\'egration d{\textquoteright}une classe d{\textquoteright}\'equations aux d\'eriv\'ees partielles du second et du troisi\`eme ordre \`a une fonction inconnue de $n$ variables ind\'ependantes},
     series = {Th\`eses de l'entre-deux-guerres},
     number = {149},
     year = {1933},
     language = {fr},
     url = {http://archive.numdam.org/item/THESE_1933__149__1_0/}
}