@article{10_4064_ap_20_1_19_40,
     author = {Cin Hua Szu},
     title = {On asymptotic development for solutions of ordinary differential equations},
     journal = {Annales Polonici Mathematici},
     pages = {19--40},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1968},
     doi = {10.4064/ap-20-1-19-40},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-20-1-19-40/}
}