@article{EJDE_2003__2003__a120,
     author = {Grammatikopoulos,  Myron K. and Kelevedjiev,  Petio S.},
     title = {Minimal and maximal solutions for two-point boundary-value problems},
     journal = {Electronic journal of differential equations},
     year = {2003},
     volume = {2003},
     zbl = {1028.34015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a120/}
}