@article{10_4153_CMB_1996_017_0,
     author = {Baars, Jan and Gladdines, Helma},
     title = {On the {Linear} {Invariance} of {Lindel\"of} {Numbers}},
     journal = {Canadian mathematical bulletin},
     pages = {129--137},
     year = {1996},
     volume = {39},
     number = {2},
     doi = {10.4153/CMB-1996-017-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1996-017-0/}
}