@article{ELA_1998__4__a2,
     author = {McDonald, Judith J. and Olesky, D.Dale and Schneider, Hans and Tsatsomeros, Michael J. and van den Driessche, P.},
     title = {$Z$-pencils},
     journal = {The electronic journal of linear algebra},
     pages = {32--38},
     publisher = {mathdoc},
     volume = {4},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_1998__4__a2/}
}