@phdthesis{THESE_1931__131__1_0,
     author = {Margoulis, Wladimir},
     title = {Les abaques \`a transparent orient\'e ou tournant. {Th\'eorie} g\'en\'erale de la repr\'esentation plane des \'equations. {Applications} \`a l'art de l'ing\'enieur},
     series = {Th\`eses de l'entre-deux-guerres},
     number = {131},
     year = {1931},
     language = {fr},
     url = {http://archive.numdam.org/item/THESE_1931__131__1_0/}
}