@article{EMJ_2013_4_2_a4,
     author = {G. A. Karapetyan and H. G. Tananyan},
     title = {The small parameter method for regular linear differential equations on unbounded domains},
     journal = {Eurasian mathematical journal},
     pages = {64--81},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2013_4_2_a4/}
}