@article{EJDE_2002__2002__a261,
     author = {Rozenblum,  Grigori},
     title = {On some analytical index formulas related to operator-valued symbols},
     journal = {Electronic journal of differential equations},
     year = {2002},
     volume = {2002},
     zbl = {1006.35104},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2002__2002__a261/}
}