@article{BSMF_1930__58__60_0,
     author = {Haag, J.},
     title = {La th\'eorie du spiral et ses applications \`a la chronom\'etrie},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {60--89},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {58},
     year = {1930},
     doi = {10.24033/bsmf.1158},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1158/}
}