@article{IJAMCS_2003_13_4_a3,
     author = {Delattre, C. and Dochain, D. and Winkin, J.},
     title = {Sturm-Liouville {Systems} {Are} {Riesz-Spectral} {Systems}},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {481--484},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2003_13_4_a3/}
}