@article{JSFS_1998__139_2_35_0,
     author = {Njiki, Roger L\'eopold},
     title = {Co{\"\i}nt\'egration et test d'efficience sur les march\'es d\'eriv\'es},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {35--59},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {139},
     number = {2},
     year = {1998},
     language = {fr},
     url = {http://archive.numdam.org/item/JSFS_1998__139_2_35_0/}
}