@article{MS2_1995__77_2_167353,
     author = {Robert Magnus},
     title = {On the {Multiplicity} of an {Analytic} {Operator-Valued} {Function.}},
     journal = {Mathematica Scandinavica},
     pages = {108--118},
     publisher = {mathdoc},
     volume = {77},
     number = {2},
     year = {1995},
     zbl = {0851.30029},
     url = {http://geodesic.mathdoc.fr/item/MS2_1995__77_2_167353/}
}