@article{NAM_1889_3_8__150_0,
     author = {Andrade, J.},
     title = {Sur l'invariant diff\'erentiel des figures congruentes},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {150--158},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {3e s{\'e}rie, 8},
     year = {1889},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1889_3_8__150_0/}
}