@article{10_4064_ap_32_1_43_57,
     author = {Janusz Mika},
     title = {Higher order singular perturbation method for linear differential equations in {Banach} spaces},
     journal = {Annales Polonici Mathematici},
     pages = {43--57},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {1976},
     doi = {10.4064/ap-32-1-43-57},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-32-1-43-57/}
}