@article{JSFS_1887__28__128_0,
     author = {Cheysson, E.},
     title = {Les cartogrammes \`a teintes gradu\'ees},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {128--134},
     year = {1887},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {28},
     language = {fr},
     url = {https://www.numdam.org/item/JSFS_1887__28__128_0/}
}