@article{AUM_2019_73_2_a0,
     author = {Banasiak, Jacek},
     title = {Logarithmic norms and regular perturbations of differential equations},
     journal = {Annales Universitatis Mariae Curie-Sk{\l}odowska. Mathematica },
     pages = {5--19},
     publisher = {mathdoc},
     volume = {73},
     number = {2},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUM_2019_73_2_a0/}
}