@article{ETNA_1996__4__a1,
     author = {Kunkel, Peter and Mehrmann, Volker},
     title = {Local and global invariants of linear differential-algebraic equations and their relation},
     journal = {Electronic transactions on numerical analysis},
     pages = {138--157},
     publisher = {mathdoc},
     volume = {4},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_1996__4__a1/}
}