@article{MS2_1967__20_165989,
     author = {Bj\"orn Textorius and B. Marksj\"o},
     title = {On the {Stability} of {Linear} {Differential} {Equations} in {Spaces} with an {Indefinite} {Metric.}},
     journal = {Mathematica Scandinavica},
     pages = {177--192},
     publisher = {mathdoc},
     volume = {20},
     year = {1967},
     zbl = {0167.44203},
     url = {http://geodesic.mathdoc.fr/item/MS2_1967__20_165989/}
}