@article{BSMF_1877__5__136_1,
     author = {Lucas, \'Ed.},
     title = {Formules fondamentales de g\'eom\'etrie tricirculaire et t\'etrasph\'erique},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {136--143},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {5},
     year = {1877},
     doi = {10.24033/bsmf.111},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.111/}
}