@article{NAM_1847_1_6__350_1,
     author = {Lebesgue},
     title = {V\'erification analytique de la formule, question 69},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {350--353},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {1e s{\'e}rie, 6},
     year = {1847},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1847_1_6__350_1/}
}