@article{MM2_1977__21_154457,
     author = {V. Stallbohm and G. Hetzer},
     title = {Eine {Existenzausgabe} f\"ur asymptotisch lineare {St\"orungen} eines {Fredholmoperators} mit {Index} 0.},
     journal = {Manuscripta mathematica},
     pages = {81--100},
     publisher = {mathdoc},
     volume = {21},
     year = {1977},
     zbl = {0362.47027},
     url = {http://geodesic.mathdoc.fr/item/MM2_1977__21_154457/}
}