@article{AFM_1967_391-410_a9,
     author = {Ernst Mohr},
     title = {Das {Spektrum} zweier gekoppelter zueinander adjungierter elliptischer {Differentialgleichungen} zweiter {Ordnung}},
     journal = {Annales Fennici Mathematici},
     publisher = {mathdoc},
     volume = {391-410},
     year = {1967},
     doi = {10.5186/aasfm.1967.401},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1967.401/}
}