@article{10_4064_sm_42_1_87_90,
     author = {Eberhard Gerlach},
     title = {Generalized invariant subspaces for linear operators},
     journal = {Studia Mathematica},
     pages = {87--90},
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {1972},
     doi = {10.4064/sm-42-1-87-90},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-42-1-87-90/}
}