@article{ASNSP_1992_4_19_1_113_0,
     author = {Deshouillers, Jean-Marc and Dress, Fran\c{c}ois},
     title = {Sums of 19 biquadrates : on the representation of large integers},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {113--153},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 19},
     number = {1},
     year = {1992},
     mrnumber = {1183760},
     zbl = {0769.11035},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1992_4_19_1_113_0/}
}