@article{10_4064_sm_38_1_341_372,
     author = {D. van Dulst},
     title = {Perturbation theory and strictly singular operators in locally convex spaces},
     journal = {Studia Mathematica},
     pages = {341--372},
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {1970},
     doi = {10.4064/sm-38-1-341-372},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-38-1-341-372/}
}