@article{10_4064_ap_44_1_73_80,
     author = {M. Cecchi and M. Marini and P. L. Zezza},
     title = {Boundary value problems on [a,b) and singular perturbations},
     journal = {Annales Polonici Mathematici},
     pages = {73--80},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1984},
     doi = {10.4064/ap-44-1-73-80},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-44-1-73-80/}
}