@article{JSFS_1997__138_4_67_0,
     author = {Maule\'on, Ignacio},
     title = {Instability and long memory in conditional variances},
     journal = {Journal de la Soci\'et\'e de statistique de Paris},
     pages = {67--88},
     publisher = {Soci\'et\'e de statistique de Paris},
     volume = {138},
     number = {4},
     year = {1997},
     language = {en},
     url = {http://www.numdam.org/item/JSFS_1997__138_4_67_0/}
}