@article{10_4064_sm_66_3_307_320,
     author = {H. Bart and D. Lay},
     title = {The stability radius of a bundle of closed linear operators},
     journal = {Studia Mathematica},
     pages = {307--320},
     publisher = {mathdoc},
     volume = {66},
     number = {3},
     year = {1979},
     doi = {10.4064/sm-66-3-307-320},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-66-3-307-320/}
}